Syringe Filter, PTFE, 0.22µm, 13mm Diameter. Denville. the membrane, not leak around it. Denville Syringe Filters are easy to use. They may be used with any luer-lock syringe and are color-coded for easy recognition. The 30mm syringe filters can filter up to 100mL of sample with a retention volume of less than 100µL.