Idler Pulley Idler Pulley (Pulley Only) Grade Type:Regular Groove Quantity:3 Maximum Belt Width (mm):9 mm Mounting Hardware Included:No Pulley Bearing Inside Diameter (mm):17 mm Pulley Bearing Quantity:1 Pulley Bearing Width (mm):12 mm Pulley Diameter (mm):53 mm Pulley Material:Polyamide 6.6 With 30% Glass Fiber Fill Pulley Width (mm):15 mm Pulley/Belt Type:Serpentine Universal Or Specific Fit:Specific