Autotecnica Belt Tensioner - GM1413171 Part #: GM1413171 Line: AUT Autotecnica Belt Tensioner Limited Lifetime Warranty Contact Surface: Smooth Flanged: No Material: Aluminum Number Of Pulleys: 1 Pulley Outside Diameter (mm): 60mm Pulley Width (mm): 21mm Belt Type: Serpentine Pulley Width (in): 13/16 Inch Pulley Outside Diameter (in): 2-5/16 Inch Number Of Mounting Holes: 2 Number Of Pulley Grooves: 0 Pulley Inside Diameter (in): 0.470 Inch Pulley Inside Diameter (mm): 12mm Show More Show Less