Medical grade material: the shell is made of medical grade polypropylene PP material, and the product structure design is precise, which ensures smooth filtration, very low residue rate and reduces the waste of samples.Efficient sterilization: the filter membrane is made of polyethersulfone membrane (PES), with low protein adsorption, good hydrophilicity, high flow rate and high flux, which shortens the sterilization filtration time.High transparency: the main body of the filter vacuum cup has good transparency, which replaces the traditional glass filter.Various specifications: provide a variety of aperture and different color identification, which is convenient to distinguish and use, and meet various experimental requirements.