Individually Wrapped Gamma Sterilized Pyrogen Free Engraved Graduation Marks Low Protein Binding available in 0.22µm and 0.45µm Extremely high flow rates at very low differential pressure Lowest Protein binding material for high recovery rates PES (Polythersulfone) material is proven to be lower protein binding than CA (Calcium Acetate) with far superior durability suitable for sterile filtration of Media & other production/cleanroom tasks sterile filter liquid pharmaceuticals & protein solutions during medicinal drug processing