Harmonic Balancer Assembly Center Bolt Included:No Color/Finish:Black Degree Markings:No Depth:42.2 mm Drive Belt Type:Serpentine Grade Type:Regular Inside Diameter:100 mm Installation Hardware Included:No Keyway Type:No Mount Hole Diameter:42.2 mm Mount Hole Quantity:1 Outside Diameter:342 mm Package Contents:1 Harmonic Balancer Pulley Groove Quantity:0 California Proposition 65:WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov