GoatThroat with Single Medium Viton Seal and 4" Standoff Kit Operated Drum , Piston Action, Body Material Polypropylene, Wetted Materials Polypropylene, Viton, 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