Pall AquaPrep 600 GWV High-Capacity Groundwater capsule filters are disposable and designed specifically for the filtration of groundwater prior to dissolved metals analysis. Pall AquaPrep High-Capacity Groundwater capsule filters provide an easy, efficient way to meet filtration requirements of the EPA or other regulatory agency protocols. Pall AquaPrep groundwater capsule filters eliminate the costly decontamination, assembly/disassembly, and multiple filter membrane changes associated with reusable filter holders. Pore size: 0.45µm. Pall AquaPrep Groundwater Capsule Filters devices have a Thermopor (polyester-reinforced polysulfone) membrane; AquaPrep 600 devices feature Supor (hydrophilic polyethersulfone) membrane; GWV High Capacity devices have Versapor (acrylic copolymer) membrane. Housings are polypropylene.