HS Code for Reticulated Foam Filter Rings (US)
PRIMARY CLASSIFICATION RESULT (US)
The primary 6-digit Harmonized System (HS) code for reticulated foam filter rings is 8421.39 (Filtering or purifying machinery and apparatus for gases, Other). Under the 2026 US HTS, representative general duties are Free [Official Source].
Classification guidance note.
Candidate Subheadings & Disambiguation Matrix
| HS Subheading | WCO Subheading Description | Disambiguation Rule / Notes | Action |
|---|---|---|---|
| 8421.39 | Filtering or purifying machinery and apparatus for gases, Other | Filtering or purifying machinery and apparatus for gases, Other | View 8421.39 → |
Official Primary Sources & Authority References
USITC HTS Database ↗
USITC official Harmonized Tariff Schedule for Reticulated Foam Filter Rings.
CBP CROSS Rulings ↗
CBP e-Rulings database for Reticulated Foam Filter Rings classification precedents.
WCO Nomenclature ↗
World Customs Organization international 6-digit Harmonized System standard.
Reticulated Foam Filter Rings Frequently Asked Questions (FAQ)
What is the official 6-digit HS code for Reticulated Foam Filter Rings?
The primary 6-digit Harmonized System (HS) code for Reticulated Foam Filter Rings is HS 8421.39 (Filtering or purifying machinery and apparatus for gases, Other).
What is the US general import duty for Reticulated Foam Filter Rings?
Under the 2026 US HTS, representative MFN general duty rates for Reticulated Foam Filter Rings under HS 8421.39 are Free.
Are there alternative candidate subheadings for Reticulated Foam Filter Rings?
Yes. Depending on state (green vs. roasted, decaffeinated vs. non-decaffeinated, raw vs. processed), alternative subheadings include 842139.
What mandatory import documents are required for Reticulated Foam Filter Rings?
Commercial Invoice, Packing List, Bill of Lading, and Partner Government Agency permits where applicable.
Does de minimis duty-free exemption apply to Reticulated Foam Filter Rings?
Eligible shipments enter duty-free under statutory destination thresholds.
How are merchandise processing and customs fees calculated for Reticulated Foam Filter Rings?
Import fees are assessed on entered customs value under destination regulations.