"Fast changeover, even in the field. Pre-plumbed and pre-tested. Fits 4-bolt engine face plates. Bolts not included use existing bolts from old pump to install new pump. U.S.A. Max. PSI 3,500, HP 11 electric, 15 gas, Fuel Type Electric, gas, GPM 4 1/2, Shaft Diameter in. 20mm, Application Pressure washer pump. Brand CAT Belt drive"