VacuCap PF Bottle-Top Filters Sterile For volumes of 500mL to 1L. Hydrophilic polyethersulfone membrane. 60mm diameter. 0.8/0.2um pore size. Polyester membrane support. Filtration area is 30cm2. Acrylic housing. Built-in prefilter and one piece of tubing per ten filter devices. 10/pk.