Nanosep MF Centrifugal Device 0.45um pore size. Wildberry. 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. 24/pk.