This economical asymmetric 115mL polyethersulfone filter unit with a polystyrene housing is ideal for small-volume benchtop filtration. Unit has a wide stable base design and is fitted with a 0.2µm/50mm Supor® PES membrane filter. Pore size and membrane type are printed in easy-to-see blue on the side of each unit. This product is not intended for use in direct patient care or diagnostic procedures. Sterile. Graduated. Material: polystyrene housing with a PES membrane. Upper capacity: 150mL. Receiver capacity: 115mL. Membrane diameter: 50mm. Pore size: 0.2µm. 72/Case. Nalgene® #: 524-0020.