Carbon Block Filter End Caps
Precision-machined plastic caps sealing carbon block cartridges in water filtration housings. Essential retention components for water purification, HTS 8421.99.0140.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If generic plastic caps without filter sealing features
Plastic stoppers/lids without specific machinery function classify by material.
If end caps for industrial oil filters
Non-water filtration parts use general machinery provisions.
If rubber gasket components imported separately
Rubber tubes/profiles classify in Chapter 40.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Specify thread patterns (e.g
• 9-3/4" standard) and O-ring gland dimensions
• Include filter scoring data showing carbon block retention function
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