high flow rate ptfe 0.22 micron filter for petrochemicals PTFE Syringe Filters - Polytetrafluoroethylene Syringe Filters We have Best quality of PTFE syringe filters available ex stock in all sizes and micron sizes are 13mm, 25 mm, micron rating : 0.22, 0.45 micron also available in 50 mm disc for Vent filter applications