Description: 100% Brand New. Never Been Used 2 Groove Water Pump Pulley Finish: Polished Material: Aluminum Grooves: Double The pulley diameter is 6 9/16". The pulley is 3" tall. The bolt pattern is 2 1/8". The center hole is 5/8". Belt Type: V-Belt High Quality Easy install Simple operation 3 Groove Crankshaft Water Pump Pulley Finish: Polished Material: Aluminum Grooves: 3 .