Stainless Steel Piston Pump for 5, 15, 30 & 55 gallon drums. Ideal for transferring solvents, acids and. other corrosive chemicals that are compatible with 316 Stainless Steel and PTFE. Dispenses8 oz per stroke. Included: 22 1/2"" PTFE extension tube, 2"" npt bung adapter for 15, 30 & 55 gallon drums. 5-gallon pail adapters sold separately, Model 134 or 258. Wetted Materials: PTFE, 316 Stainless Steel