Cellulose Acetate filters feature hydrophilic membranes with low protein binding, suitable for aqueous protein solutions. The filters are nitrate-free, making them suitable for groundwater filtration. Housings are specifically designed to minimize sample holdup and maximize recovery non-pigmented acrylic or polypropylene (PP) housings feature integral filter sealing to avoid the risk of contamination from pigments and adhesives each filter is clearly marked with membrane Pore size housings have standard luer connectors; 50-mm filters feature 7 to 13.5 mm hose barb connectors.