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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for engine lubricating oil filtering
Oil filters as machinery parts go to chapter 84
If impregnated with oil samples
Oil-impregnated testing media become petroleum products
If part of complete testing machines
Lab testing instruments classify under chapter 90
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
• Reference ISO 16889/4406 standards; provide extraction solvent compatibility; distinguish from bulk oil filter media
Related Products 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.