Complete, presterilized, non-toxic, disposable filter units for membrane filter analysis.

• Multiple graduations on uppers; receivers are graduated from 20 to 115 ml
• Membranes are triton-free and non-toxic
• Ø: 47mm
• Units can be used to perform pressure filtrations.
• EPA water quality testing

Receivers are made of polystyrene, with a cellulose nitrate membrane. Uppers are made of polypropylene. After filtration, upper chamber can be easily twisted off of receiver. Conforms to APHA standards for water-quality work.

The 0.45 µm size meets requirements for APHA Standard Methods and U.S.