Reliable material: made of polycarbonate, its good abrasion resistance, flame resistance and oxidation resistance can help your 3D printer to complete the work smoothly.Wide compatibility: Suitable for V-groove aluminum materials for most DIY 3D printers, including but not limited to for , for 3, for Anet, etc.Excellent expressiveness: These 3D printer wheels move smoothly, with low noise and high printing accuracy, which can improve the printing speed very well. They are practical accessories for 3D printers.Packing list: You will receive a package containing 20 3D printer polycarbonate pulleys, suitable for most DIY 3D printers, with a long service life.Wide range of uses: not only mainly used for 3D printers, but also for engraving machines, hot-wire machines, lidar cutting machines, camera sliders, plasma cutting machines, robots, furniture and other DIY machines.Colour:silverMaterial:plasticPackage Contents:8 x 3D printer polycarbonate pulleysOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.