500mL Filters feature expanded 90mm diameter membrane to increase flow and reduce clogs for faster filtration. Easy-to-read molded graduations marks on bottle top filter. Bold easy-to-read printed membrane and pore size for easy identification. Curved bottle design for easy handling. Printed lot number and expiration date on every bottle top. Improved filter support provides faster flow rates. Angled hose barb adapter fits three size hose diameters and prevents the filter from tipping.