Sterile, 250 mL Steritop Quick Release-GP 45 mm threaded bottle top filter with 0.22 µm pore size fast flow polyethersulfone (PES) Express PLUS membrane. S2GPT02RE. 12 pack, GP, 0.22 µm, polyethersulfone, 250 mL 45 mm, radio-sterilized. Price could not be retrieved.