pp wound filter cartridges: 1. Constructed by cotton yarn and PP frame. 2. We uses pure pp raw material. Not recycle material. 3. Various filtraion fineness can be selected. 1 microns , 5 microns, 10 microns, 20 microns, 50 microns, 100 . 4. Standard size for various filter system. 5. When use for high temperature strong chemical, Titanium frame is available. Material of Construction: ? Filter Media: Polypropylene, cotton or glass fiber ? Core: Polypropylene or stainless steel ? Seal Material:Silicone,EDPM,Buna,Viton, Teflon ? Micron Rating: 1μm, 3μm, 5μm, .. 100μm