Smooth surface,strong anti-abrasion,good air permeability,high strength, and remarkable filtration effect,ptfe filter cloth. TS-PRC1884(White) Material From: Kunshan Warp: 18D Weft: 840D Model No.Breaking Strength(N/5x20 cm)Breaking Elongation(%) Thickness(mm) Weight(g/m2) Air Permeability(200P)(L/m2*s)WarpWeftWarpWeft TS-PRC1884 3129.2 3483.5 31.85 34.80 0.7 309 549.7ptfe filter cloth.