Gates DriveAlign Belt Tensioner - 39487 Part #: 39487 Line: GAT Gates DriveAlign Belt Tensioner 1 Year Limited Warranty Contact Surface: Grooved Material: Thermoplastic Number Of Pulleys: 1 Pulley Outside Diameter (mm): 70mm Pulley Width (mm): 22mm Belt Type: Serpentine Pulley Width (in): 7/8 Inch Pulley Outside Diameter (in): 2-3/4 Inch Number Of Mounting Holes: 2 Number Of Pulley Grooves: 4 Pulley Inside Diameter (mm): 17mm Show More Show Less