Jumbosep Centrifugal Device 3000 MWCO. Gray. Concentrates 60mL to 5mL in \<30 minutes. Built-in deadstop. Low-protein binding OMEGA modified polyethersulfone membrane inserts. Requires 250mL swinging bucket rotor. Inserts holders cups and caps. 15.2cm2 area. Nonsterile sanitizable. 4/pk.