• Nylon filtration membrane (mesh) • Improved aeration between the tube and the mesh for a rapid filtration • Fit on 50 ml or 15 ml centrifuge tubes (with adapter, 1 supplied in each pack) • Legs of 1 mm height, allowing to use the sieve on plates in boxes • SureStrain's polypropylene molded grip and frame ensure aseptic handling • Sterile (gamma) and individually wrapped • DNase, RNase free • Pyrogen free • Cytotoxin free