RMV/RMW - Economy Axial Radial Drive Pump. Featuring - Manifold: Aluminum recision die cast special anticorrosion finish. Bolts: Three 6mm cadmium plated steel. Plungers: hardened stainless steel. Crankcase: Orecision die cast, large coupling fins. Bearings: Premium oversized ball and needle bearings. Valves, Seats and Springs: Plastic poppet under 2300 psi, stainless steel poppet over 2300 psi, seat and cage, stainless steel spring. Seals: buna-N 2000 and 2400 psi single seal, 2500 psi to 3000 psi dual seals.