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Official data Source: US Census Bureau international trade data Data through August 2026 · updated monthly

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HS 8546.10

Electrical insulators of glass

In short

  • The US imported $57.9M of this product over the 12 months to August 2026, up 46% on the year before.
  • China is the largest supplier, with 66.7% of US imports; Italy is next, with 30.0%.
  • China is the cheapest main supplier before and after freight and duty, landing at $19.78 each.
  • Duty paid averaged 30.4% of the value of imports in August 2026, up 3.0 points on a year earlier.
  • Italy is gaining share: 30.0% over the last 12 months, up from 15.1%.
  • US exports were $6.7M over the last 12 months; the largest market is China, with 17.2%.

US imports, Aug 2026

$4.3M

↑ +31% vs Aug 2025

Last 12 months

$57.9M

↑ +46% vs the 12 months before

Average duty paid

30.4%

↑ +3.0 pts vs Aug 2025

Top supplier

China

66.7% of US imports

US imports by month

The last 13 months, so the same month a year ago is on the left. August 2026 is highlighted. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

Aug2025SepOctNovDecJan2026FebMarAprMayJunJulAugDuty ↓China ↓
Show the numbers
MonthUS imports
August 2025$3.3M
September 2025$7.2M
October 2025$5.2M
November 2025$4.7M
December 2025$5.7M
January 2026$4.6M
February 2026$2.8M
March 2026$4.7M
April 2026$3.3M
May 2026$5.0M
June 2026$4.7M
July 2026$5.6M
August 2026$4.3M

What changed

  • US imports were $4.3M in August 2026, down 23% from July 2026 and up 31% from August 2025.
  • Over the 12 months to August 2026 they totalled $57.9M, up 46% on the 12 months before.
  • Biggest moves in market share since July 2026: Italy up from 4.9% to 30.0%, Spain down from 27.7% to 0.0%.
  • Average price from Italy fell 33% since July 2026, to $52.74 each.
  • Duty paid on imports from China rose from 36.3% to 40.4% of their value since July 2026.
  • Duty paid on imports from Italy rose from 7.4% to 10.0% of their value since July 2026.

US trade by year

US imports were $57.9M in the 12 months to Aug 2026, up 79% on the 12 months to Aug 2017. US exports were $6.7M, down 20%. In January 2022 the HS 2022 revision moved some goods between this code and 8549.21, 8549.29, 8549.31 and 3 more, so part of a change across the dashed line can be the revision. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

2017201820192020202120222023202420252026HS 2022China ↓Duty ↑Duty ↑Duty ↑Duty ↑
Show the numbers
PeriodUS imports
12 months to Aug 2017$32.2M
12 months to Aug 2018$32.6M
12 months to Aug 2019$23.1M
12 months to Aug 2020$24.2M
12 months to Aug 2021$24.6M
12 months to Aug 2022$28.5M
12 months to Aug 2023$37.6M
12 months to Aug 2024$27.4M
12 months to Aug 2025$39.5M
12 months to Aug 2026$57.9M
  • China
  • Italy
  • Spain
  • Japan
  • All countries
Share of US imports
Show the numbers
PeriodChinaItalySpainJapan
12 months to Aug 201738.1%5.6%1.4%3.2%
12 months to Aug 201857.3%9.6%1.1%3.5%
12 months to Aug 201949.4%11.4%3.5%4.1%
12 months to Aug 202037.1%23.5%11.8%1.9%
12 months to Aug 202142.5%20.6%10.8%1.7%
12 months to Aug 202253.6%28.2%7.9%2.1%
12 months to Aug 202348.6%32.2%15.6%1.2%
12 months to Aug 202471.1%2.0%18.5%2.4%
12 months to Aug 202564.7%15.1%15.6%1.2%
12 months to Aug 202648.9%30.0%17.0%1.5%
Duty paid, % of value
Show the numbers
PeriodChinaItalySpainJapanAll countries
12 months to Aug 20172.9%2.9%2.9%2.9%2.8%
12 months to Aug 20182.9%2.9%2.9%2.9%2.9%
12 months to Aug 20195.2%2.9%2.9%2.9%3.9%
12 months to Aug 20207.2%2.9%2.9%2.9%4.4%
12 months to Aug 202127.9%2.9%2.9%2.9%13.6%
12 months to Aug 202227.9%2.9%2.9%2.9%16.5%
12 months to Aug 202327.9%2.9%2.9%2.9%15.0%
12 months to Aug 202427.5%2.9%2.9%2.9%20.4%
12 months to Aug 202538.0%5.7%6.0%4.9%26.7%
12 months to Aug 202643.5%13.5%13.7%13.0%28.2%
PeriodUS importsDuty paidUS exports
12 months to Aug 2026$57.9M+46%28.2%+1.6 pts$6.7M−21%
12 months to Aug 2025$39.5M+44%26.7%+6.2 pts$8.5M−2.7%
12 months to Aug 2024$27.4M−27%20.4%+5.4 pts$8.7M−30%
12 months to Aug 2023$37.6M+32%15.0%−1.4 pts$12.5M+13%
12 months to Aug 2022HS 2022 revision$28.5M+16%16.5%+2.9 pts$11.1M−5.9%
12 months to Aug 2021$24.6M+1.9%13.6%+9.2 pts$11.8M+32%
12 months to Aug 2020$24.2M+4.5%4.4%+0.5 pts$8.9M−4.7%
12 months to Aug 2019$23.1M−29%3.9%+1.1 pts$9.3M−4.3%
12 months to Aug 2018$32.6M+1.0%2.9%+0.1 pts$9.8M+17%
12 months to Aug 2017$32.2M2.8%$8.3M

Who supplies the US

August 2026. Small figures under each value are the change from August 2025. Landed cost by origin, below, adds freight and duty to the price.

CountryUS importsShareAverage priceDuty paidLast 13 months
China$2.9M66.7%+35.1 pts$11.12 each+59%40.4%−17.5 pts
Italy$1.3M30.0%−21.9 pts$52.74 each+19%10.0%−2.9 pts
Japan$81K1.9%+0.7 pts$2,676 each+17233%11.7%−6.2 pts
India$15K0.4%+0.2 pts$12.89 each−59%12.9%−26.5 pts
Germany$14K0.3%−1.3 pts$26.46 each+900%10.0%−4.5 pts
Switzerland$13K0.3%−0.9 pts$708.22 each+74%12.5%−2.4 pts
Canada$7K0.2%+0.1 pts$386.11 each+37%12.9%+12.9 pts
Mexico$6K0.1%0.0 pts$2.58 each−62%0.0%−14.3 pts
Vietnam$3K0.1%new$3.85 each15.4%
All countries$4.3M100.0%$14.93 each+629%30.4%+3.0 pts

The 3 largest suppliers had 95.8% of US imports over the last 12 months.

Landed cost by origin

What importers paid to land this product at a US port from each main supplier, June–August 2026: the price, freight and insurance to the first US port, and duty, per unit. Suppliers with 3% or more of these imports, cheapest landed first. Small figures under landed cost are the change from the same months a year earlier.

  • Price
  • Freight and insurance
  • Duty
CountryPriceFreight and insuranceDutyLanded costMake-up
China$13.42 each$1.25 each9.3% of price$5.11 each38.1% of price$19.78 each+42%
Spain$25.24 each$0.41 each1.6% of price$3.26 each12.9% of price$28.91 each+30%
Italy$69.00 each$2.47 each3.6% of price$6.81 each9.9% of price$78.27 each+49%
All countries$17.09 each$1.26 each7.4% of price$4.89 each28.6% of price$23.25 each+296%

Landed at a US port, China was cheapest, at $19.78 each: 31.6% below Spain.

Landed cost from Italy rose 49% on a year earlier, to $78.27 each, mostly on price: $44.17 each then, $69.00 each now.

How the market is shifting

Italy gained the most share: 30.0% of US imports over the last 12 months, up from 15.1% in the 12 months before. China lost the most: 48.9%, down from 64.7%. The charts show September 2024 to August 2026 for the 4 largest suppliers over the last 12 months. Dotted lines mark lasting changes in duty paid, labelled with the supplier, or "Duty" when several moved; the tariff timeline lists each one with its notices.

  • China
  • Italy
  • Spain
  • Japan
  • All countries
Share of US imports
Show the numbers
MonthChinaItalySpainJapan
September 202491.5%0.0%4.7%0.8%
October 202463.0%0.0%33.2%0.1%
November 202470.6%0.0%22.6%4.3%
December 202487.4%1.9%7.1%0.6%
January 202573.5%18.7%5.5%1.2%
February 202529.0%33.4%34.1%2.2%
March 202537.3%48.7%7.3%1.2%
April 202577.7%0.0%17.8%1.3%
May 202591.7%0.0%0.0%0.6%
June 202556.2%0.0%35.9%0.6%
July 202596.6%0.0%0.3%0.0%
August 202531.7%51.9%10.3%1.2%
September 202520.5%56.1%20.0%1.7%
October 202548.6%28.6%20.4%1.1%
November 202526.7%69.5%0.0%1.3%
December 202538.6%52.0%6.1%0.1%
January 202661.4%26.8%8.4%2.5%
February 202664.3%0.0%24.9%6.0%
March 202651.9%11.5%34.6%0.2%
April 202666.0%9.0%16.4%0.0%
May 202643.2%28.4%23.6%1.0%
June 202664.7%11.4%20.5%1.3%
July 202662.1%4.9%27.7%2.0%
August 202666.7%30.0%0.0%1.9%
Duty paid, % of value
Show the numbers
MonthChinaItalySpainJapanAll countries
September 202427.9%n/a2.9%2.9%25.8%
October 202427.9%n/a2.9%2.9%18.6%
November 202427.9%n/a2.9%2.9%20.6%
December 202427.9%2.9%2.9%2.9%24.7%
January 202527.9%2.9%2.9%2.9%21.3%
February 202528.0%2.9%2.9%2.9%10.3%
March 202540.8%2.9%2.9%2.9%16.9%
April 202550.9%n/a7.5%7.3%40.8%
May 202556.6%n/an/a12.9%52.7%
June 202557.9%n/a12.9%12.9%38.3%
July 202557.9%n/a12.9%n/a56.3%
August 202557.9%12.9%13.6%17.9%27.3%
September 202557.9%12.2%15.0%15.4%22.5%
October 202557.9%15.0%15.0%15.0%36.0%
November 202550.0%15.0%n/a15.0%24.7%
December 202547.9%15.0%15.0%15.0%27.9%
January 202647.9%15.0%15.0%15.0%35.4%
February 202643.5%n/a15.0%15.0%33.0%
March 202637.9%12.9%12.9%4.0%25.5%
April 202637.9%12.9%12.9%2.9%29.2%
May 202637.9%12.9%12.9%10.9%23.6%
June 202637.9%10.8%12.9%12.9%28.8%
July 202636.3%7.4%12.9%12.8%27.2%
August 202640.4%10.0%n/a11.7%30.4%

Tariff actions touching this product

When the duty paid on this product changed and stayed changed, for its main suppliers and all countries, newest first, with the Federal Register notices that named the product in the 3 months before. Rates are medians of the 4 months either side, less any usual seasonal swing. A change shows what happened to duty paid, not why; read each notice for what it did.

  1. January 2026 · Duty paid: China 54.0% → 40.7%.
  2. September 2025 · Duty paid: all countries 45.6% → 25.9%.
  3. April–June 2025 · Duty paid: China 28.0% → 57.3%, Spain 2.9% → 13.6%, all countries 19.2% → 46.8%.
  4. May 2024 · Duty paid: all countries 16.0% → 24.0%.
  5. June 2022 · Duty paid: all countries 18.2% → 11.4%.
  6. September 2021 · Duty paid: all countries 14.7% → 19.9%.
  7. August 2020 · Duty paid: China 3.1% → 27.9%, all countries 3.0% → 10.8%.
  8. April 2019 · Duty paid: China 9.1% → 3.4%.

Where it enters the US

Main ports of entry over the 12 months to August 2026: US imports and share.

  1. Houston, TX$20.5M · 35.4%
  2. Norfolk-Newport News, VA$8.4M · 14.5%
  3. Savannah, GA$5.5M · 9.5%
  4. Long Beach, CA$4.9M · 8.5%
  5. Los Angeles, CA$4.7M · 8.1%

Where US exports go

US exports were $490K in August 2026, down 42% from August 2025, and $6.7M over the last 12 months, down 21% on the 12 months before. Fastest-growing market with 3% or more of US exports: China, up 179%.

MarketLast 12 monthsSharevs 12 months before
China$1.1M17.2%+179%
Canada$997K14.9%−36%
Netherlands$973K14.5%−29%
Mexico$822K12.3%−6.9%
Philippines$685K10.2%−10%
Hong Kong$427K6.4%−66%
India$367K5.5%−1.8%
Germany$169K2.5%−56%
Other countries (37)$1.1M16.5%+11%
All countries$6.7M100.0%−21%

Markets abroad

Each country's own import figures for this product, from UN Comtrade: the 8 biggest importers outside the US in the latest year each has reported, what they bought from the US, and the change from the year before. Values usually include freight and insurance to the importer's border, so they run a little above US export figures. Countries report a year or more late; 109 have reported 2025 so far. Where a country's figure for imports from the US is under half or over double what the US recorded exporting there that year, the US figure is shown under it.

MarketImportsvs year beforeFrom the USUS share
Saudi Arabia$109.8Min 2025+9.7%$37K0.0%
Canada$24.8Min 2025+15%$427KUS records $1.5M1.7%
France$23.3Min 2025+7.2%$262K1.1%
Australia$20.7Min 2025+435%$65K0.3%
Mexico$14.9Min 2025+484%$905K6.1%
United Kingdom$13.8Min 2025+89%$338K2.4%
Turkey$11.9Min 2025+856%$00.0%
Portugal$11.4Min 2025+84%$00.0%

The biggest market outside the US is Saudi Arabia, which imported $109.8M of this product in 2025, under 0.1% of it from the US.

Of these, imports into Turkey grew fastest: up 856% from 2024 to 2025.

Other products under heading 8546: electrical insulators of any material. US trade over the 12 months to August 2026.

ProductUS importsUS exports
Electrical insulators, not elsewhere specifiedHS 8546.90$299.4M$231.3M
Electrical insulators of ceramicsHS 8546.20$181.3M$52.7M
About these figures
  • Source: US Census Bureau international trade data, not seasonally adjusted, in US dollars. Retrieved November 3, 2026.
  • US imports are general imports at customs value, which excludes freight and insurance. Exports are at free-alongside-ship value.
  • Average price is customs value divided by quantity (number of items), across all of the product's 10-digit lines.
  • Duty paid is the duty Census calculates on each country's imports for consumption, as a share of their value. It moves with tariff changes, exemptions and the mix of goods within the product.
  • Landed cost adds Census's import charges (freight, insurance and other costs of bringing the goods to the first US port) and calculated duty to the customs value, per unit, across the product's 10-digit lines. It leaves out antidumping and countervailing duties, customs fees and transport inland. Prices are averages across the goods within the code, so a lower one can mean cheaper goods, not the same goods for less.
  • Markets abroad are each country's imports as it reports them to UN Comtrade, in US dollars, usually including freight and insurance. Countries report a year or more late and in their own edition of the HS codes, so one still on an older edition is missing for codes that changed in 2022.
  • Census revises recent months, so figures can change slightly. These are estimates for research and planning, not customs or legal advice.

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