BE 85.129.017B is a professional-grade AR RRA35G30E-F17 triplex plunger pump assembly specifically designed for 1-1/8" hollow shaft electric motors. Delivering 3,000 PSI at 3.5 GPM at a low-speed 1,725 RPM, this "Ready-to-Go" boxed kit features ceramic plungers and a forged brass manifold for extreme durability