Laboratory Glass Fiber Prefilters from Japan
Coarse glass fiber filter discs used as prefilters in lab vacuum manifolds to trap large particulates before finer filtration. Falls under HTS 7019.90.51.40 as specialized glass fiber filters derived from glass wool for analytical chemistry applications.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide chemical composition analysis confirming fused silica or glass wool specs per Chapter notes
• Declare as 'prefiltration media only' to avoid classification as lab glassware under 7017
• Watch for contamination risks; ensure cleanroom packaging documentation