Harmonic Balancer Harmonic Balancer Assembly Center Bolt Included:No Color/Finish:Black Degree Markings:Yes Depth:29 mm Drive Belt Type:V-Ribbed Belt Grade Type:Standard Inside Diameter:26 mm Installation Hardware Included:No Keyway Type:Yes Mount Hole Diameter:26 mm Mount Hole Quantity:1 Outside Diameter:148 mm Package Contents:Harmonic Balancer, Instruction Sheet Pulley Groove Quantity:6