🍀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. Review 3D Printer Parts Accessories GT2 Tiing Pulley 2GT 48 Teeth Bore... This pulley is for GT2 timing belt. Item Description: Adopt high quality aluminum, excellently machined, finished smoothly. sourcing map Timing Pulley 20&60 Teeth 8mm&10mm Bore Synchronous 4Pcs GT2 Timing Belt Pulley 8mm Bore For 3D Printe... – Grandado Each of the two sides of the wheels were mounted bearings. 🍀Made of high-quality aluminum, well-processed, smooth finished. Perfect choice for building a 3D printer or similar projects. 3d Printer Filter Senrise 5pcs GT2 Aluminum Timing Belt Pulley For 3D Printer CNC 30/36 60 Tooth GT2 Timing Belt Pulley 5mm Bore Aluminum 3D Printer 🍀Package Content: 2 X Timing Pulley.