Teeth Type : 2GT-30/36/40/48/60 Teeth. Size:30/36/40/48/60T ; Inner bore:5/6.35/8/10/12mm ; Width:6/10mm 🍀Made of high-quality aluminum, well-processed, smooth finished. 🍀The surface of the synchronous wheel is anodized to make it more wear-resistant and better in performance. 🍀This pulley is for GT2 timing belt.Each of the two sides of the wheels were mounted bearings.Perfect... GT2 Timing Belt Pulley, 30/36/40/48/60 Teeth Bore For 5/6.35/8/10 TUZUK 5M GT2 Correa de distribución 15mm de ancho 4pcs 20 dientes 5mm Bore Timing Belt Polea 4pcs 20 Toothless Bore 5 mm Polea tensora 4pcs 20 dientes Bore 5mm Polea tensora para impresora 3D Buy GT2 Timing Belt Pulley 30/36/40/48/60 Teeth Bore for 5/6.35/8/10/12mm Bore Width 3D Printer Belt CNC Laser Cutter (40T-Bore 5mm-Belt 6mm) at UK