This three cylinder plunger pump features brass manifolds and anodized aluminum components. Constructed with a heat-treated crankshaft, ceramic plungers, and a dual 1 3/8-inch 6-spline male shaft, it can deliver a maximum of 600 RPM. When using this plunger pump on any thru-shaft application, use of shaft protector #1219 is recommended; this protector must be purchased separately.