PTFE membrane 1.MATERIAL: PTFE 2.PORE SIZE: 0.1um, 0.20um, 0.45um, 1.0um, 3.0um 3.DIAMETER:13, 25, 47, ... 50, 90, 100mm SPECIFICATION: 1.MATERIAL: PTFE ... (Polyether Polytetrafluoroethylene) 2.PORE SIZE: 0.1um, 0.20um, 0.45um, 1.0um, 3.0um 3.DIAMETER ...