This 50 mL conical filter unit has a polystyrene housing with Supor machV PES membrane. It is the optimal choice for small volume tissue culture work. Offers clean fast filtration of 20 to 50mL of media or buffers using the Pall Supor machV PES membrane. This low protein binding unit is non-cytotoxic and non-pyrogenic. Comes assembled with a 50mL conical tube and a separate closure. Includes 2 reusable stands in each case. Material: polystyrene housing with Supor machV PES membrane. Upper capacity: 150mL. Receiver capacity: 50mL. Membrane diameter: 50mm. Pore size: 0.2µm. Nalgene #: 564-0020.