Manufactured with the highest quality materials, under exacting clean room conditions using ISO-controlled manufacturing processes. A variety of pore sizes and filter materials to chose from. All capsules are free of adhesives to ensure product purity.- Capsule Filter, Whatman Polycap AS 36, 0.2m Pore Size, Nylon, GMF Prefilter, 1/2 SB Inlet, 1/2 SB Outlet, Sterile 14-21 Days