Description: 100% brand new, Never been tried or installed Professional installation in highly recommended(No instruction included) Water Pump Pulley: Material:Steel Color:Black Type:Double Groove Water Pump Shaft: 5/8" Bolt Hole Quantity: 4 Outside Diameter :6.25" Belt Type: V-Belt Only Use For Long Water Pump These Feature deep grooves to prevent belt from slipping Crankshaft Pulley: .