Color-coded polypropylene housing; PES, PVDF, nylon, PTFE cellulose ester, cellulose acetate, or surfactant-free cellulose membranes Acrodisc® syringe filters membrane (GXF/GHP), diam. 25 mm The 25 mm Acrodisc is recommended for sample volumes from 5 to 100 mL. The 13 mm size is recommended for samples under 10 mL in volume.