Nanosep MF Centrifugal Device 0.2um pore size. Aqua. Polypropylene. Filter medium is bio-inert modified nylon. Nonsterile sanitizable. 0.28cm2 filtration area. 500uL sample volume. 15uL concentrate volume. 14000xg force. For fixed-angle rotor centrifuge that accepts 1.5mL tubes. 500/pk.