Harmonic Balancer Harmonic Balancer Assembly Center Bolt Included:No Color/Finish:Black Degree Markings:Yes Depth:36 mm Drive Belt Type:V-Ribbed Belt Grade Type:Standard Inside Diameter:37.6 mm Installation Hardware Included:No Keyway Type:Yes Mount Hole Diameter:37.6 mm Mount Hole Quantity:1 Outside Diameter:197 mm Package Contents:Harmonic Balancer, Instruction Sheet Pulley Groove Quantity:10