ghp syringe filter solvent compatibility distributor-Lab This document provides chemical compatibility information, operating steps, and specifications for the nonsterile 33 millimeter (mm). Millex® syringe filter Red PTFE (Hydrophilic) Syringe Filters, 0.22 µm, 25 mm (100/pack) The PerkinElmer Red PTFE (Hydrophilic) Syringe Filters, 0.22 µm