Consistently woven using a given number of threads per inch, its filaments are comprised of small fibers, twisted into threads. Aazon.co: 0.2 icron Filter Cartridge Pleated Polypropylene, 2-5/8 x... This is done in two ways, by depth filtration using graded density material called felt or by surface filtration using filament woven material called mesh. A two-dimensional square of woven mesh fabric used for lower solids or higher accuracy screening and classification of solids. Contaminant particles are contained within the media by inpingment and entrapment. This results in a nonstick surface which allows for a contaminant cake to build and slough off or be removed by cleaning. Made from a smooth uniform, one piece extruded thread woven into a screen with high accuracy and consistency. Porosity is defined by nominal micron ratings (1, 5,10,25,50,100,200) indicating the largest particle that can pass through, in general, and reflecting an increase in the density. PTFE MEMBRANE SURFACE FELT: This is a filter media having a Teflon microporous membrane applied to a base of polyester felt. PEMU - MULTIFILAMENT MESH FABRIC (POLYESTER): This is a two-dimensional square-woven fabric used for light filtration and general purpose screening. FELT: This is a filtration media made from a matrix of small fibers. All filtration and screening involves limiting the passage of various sized solids by means of a barrier or fabric or media. Buy Genuine Honda 36162-PLC-003 Purge Control Solenoid Valve: Canister Purge Controls - ✓ FREE DELIVERY possible on eligible purchases Porosity is defined by a hole size in microns, with greater variety than multifilaments (i.e. 25, 50, 75, 100, 120, 150, 175, 200, 250, 300, 400, 500, 600, 800). 2 Size Filter Bag (200 Micron) | Polyester Felt | PRM Bag Filters Used for exact separation. 1 Micron Filter Fabric Size 2 (7" X 32") Polypropylene Bags Filters & Parts 120 Micron Bag