Polyethylene Pump - fits 55-gallon drums with 2 inch bung opening. Constructed of polyethylene and PVC. Can be used with mild acids, light oils, water based fluids and other materials which are Not corrosive to polyethylene and PVC. (Do Not use with lacquer thinners.) Dispensing rate of 1 pint per 5 strokes. Siphons to a lower level or pumps to higher level. Siphoning is controlled by air vent on top.