cellulose acetate membrane, pore size 0.22 μm, membrane area 54.5 cm 2, filter capacity 1000 mL: Pricing: CLS431096: polyethersulfone membrane, pore size 0.22 μm, membrane area 19.6 cm 2, filter capacity 250 mL: Pricing: CLS431097: polyethersulfone membrane, pore size 0.22 μm, membrane area 33.2 cm 2, filter capacity 500 mL: Pricing: CLS431098