Goatthroat drum pump gt200 with 4″ standoff & epdm seal goatthroat pump with single medium epdm seal and 4″ standoff kit. Hand operated drum pump, piston action, pump body material polypropylene, wetted materials polypropylene, epdm, 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.