Action pump 5, 6 & 7 gallon pail stainless piston pump 5qp-ss4 – 4 ounces per stroke this hand-operated piston pump is made with a stainless steel body and ptfe (polytetrafluoroethylene) inner components for resistance to chemicals and corrosion, and is suitable for dispensing flammables, solvents, acids, and other corrosive liquids in a variety of applications. With a maximum viscosity rating of 650 centipoise (cps), this pump delivers 4 oz. Of liquid per stroke, for a maximum of 1 gallon per minute (gpm). It comes with 1/2″ inlet and outlet ports, and a 2-5/8″ polyethylene adapter for use with 5, 6 and 7 gallon pails/drums. features: 316 stainless steel piston pump dispenses 4 oz. Per stroke. fits on 5 gallon buckets. wetted materials: 316 stainless steel and ptfe. includes a 2-5/8″ pail bung adapter construction legend: 316 ss (stainless steel), ptfe (polytetrafluoroethylene)