Hand Operated Pail Pump, Max. Outlet Pressure 5 psi, Spout Connection Size 55/64 in, Self-Priming Yes, Metered No, Includes Discharge Hose No, Piston Material Polypropylene, Features Delivers product on the up and down stroke with a zero friction easy pump design, great chemical resistance and excellent compatibility with food products, Seal Material Polyethylene, For Use With 5 gal, 6 gal Pails, Lubricants, Oils, High Viscosity Fluids, Food Products, Dyes, Mild Acids