Other
Other paper, paperboard, cellulose wadding and webs of cellulose fibers, cut to size or shape; other articles of paper pulp, paper, paperboard, cellulose wadding or webs of cellulose fibers: > Filter paper and paperboard: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 4823.20.90.00
Quantitative Filter Paper Sheets
Pre-cut sheets of ashless filter paper designed for gravimetric analysis in laboratories, with high purity and controlled porosity. Classified under HTS 4823.20.90.00 as filter paper cut to size or shape, other than rolls. Meets requirements for precise analytical filtration excluding common qualitative grades.
Glass Microfiber Filter Discs
Circular discs of borosilicate glass microfiber filter paper cut to standard diameters (e.g., 47mm) for air monitoring and liquid filtration. Falls under HTS 4823.20.90.00 as specialty filter paperboard cut to shape, other than rolls. High efficiency for fine particle retention.
Sterile Syringe Filter Membranes
Pre-cut circular filter membranes (e.g., 0.22 micron PVDF) for HPLC sample prep and sterile filtration, individually packaged. HTS 4823.20.90.00 covers these as filter paper cut to shape, other than rolls. Designed for single-use syringe attachment.
Coffee Filter Papers Cut to Shape
Cone-shaped or basket-style filter papers cut precisely for drip coffee makers, made from unbleached pulp. Classified in HTS 4823.20.90.00 as other filter paper cut to shape. Optimized porosity for optimal extraction.
Industrial Buchner Funnel Filter Sheets
Perforated circular filter sheets sized for Buchner funnels (e.g., 90mm diameter) used in vacuum lab filtration. HTS 4823.20.90.00 as other filter paper cut to size/shape. High wet strength for chemical processing.
Aquarium Filter Pads Cut to Size
Pre-cut rectangular pads of activated carbon-impregnated filter paper for aquarium mechanical filtration. Under HTS 4823.20.90.00 as other filter paperboard cut to shape. Removes impurities in freshwater systems.
HVAC Air Filter Media Sheets
Cut-to-size pleated filter paper sheets (MERV 8-13) for residential HVAC systems, with antimicrobial treatment. HTS 4823.20.90.00 covers these as other filter paper cut to shape. Balances airflow and particle capture.
Photographic Developing Filter Papers
Pre-cut filter papers with precise pore structure for darkroom chemical filtration and debris removal. Classified HTS 4823.20.90.00 as specialty filter paper cut to size. Acid-resistant for developer solutions.
Wine Finings Filter Sheets
Food-grade cellulose filter sheets cut to cartridge sizes for wine clarification and lees removal. HTS 4823.20.90.00 as other filter paper for beverage processing. High clarity retention.
Oil Analysis Filter Discs
Micro-porous filter discs (e.g., 1.2 micron) cut for machinery oil contamination testing per ISO 4406. Under HTS 4823.20.90.00 as precision filter paper. Captures wear particles.