Graco Husky 1050 air-operated double diaphragm (AODD) metal pump, part number 647731, with an aluminium fluid section and a standard aluminium center section, Buna-N seats, Acetal balls and a TPE (Hytrel) diaphragm. 1 in. (25.4 mm) NPT(f) fluid inlet and outlet, 1/2 in. NPT(f) air inlet, 3/4 in. NPT(f) air exhaust. Maximum free-flow delivery 50 gpm (189 lpm), 280 cpm, max size pumpable solids 0.125 in (3.175 mm), maximum fluid working pressure 100 psi (7 bar), maximum air consumption 25 scfm, weight 23 lb.