ATP Harmonic Balancer - 102398 Part #: 102398 Line: ATP ATP Harmonic Balancer Limited Lifetime Warranty Overall Width (in): 15/16 Inch Groove Count: 6 Belt Type: Serpentine Pulley Diameter (in): 5-1/2 Inch Number Of Bolt Holes: 4 Inside Diameter Bore Size (in): 1-15/16 Inch Show More Show Less