Goatthroat drum pump gt200s with 4″ standoff & santoprene seal goatthroat pump with single medium santoprene seal and 4″ standoff kit. Hand operated drum pump, piston action, pump body material polypropylene, wetted materials polypropylene, epdm, santoprene, max. Head 10 ft., max. Pressure 7 psi, max. Temp. 120 degrees f, max. Viscosity 1400 ssu, inlet size 1/2 in. Outlet size 3/8 in. For use on 5-55 gal. And rieke flex spout containers.