High quality material: made of high quality brass, corrosion and rust resistant, very durable. These brass drive pulleys are renowned for their stability and high load capacity. Improve the efficiency of your 3D printer. Easy to use: it is very easy to replace your worn out drive pulley. Use the Allen key supplied with the kit to remove the Allen head screws from the old pulley. When the screw is loosen, remove the old pulley and put the new one. Tighten the screw. Easy to use: it is very easy to replace your worn out drive pulley. Use the Allen key supplied with the kit to remove the Allen head screws from the old pulley. When the screw is loosen, remove the old pulley and put the new one. Tighten the screw. Compatibility: Compatible with Creality 3D Printers Ender 3 V2 / Ender 3 / Ender 3 Pro / Ender 5 / CR-10 / 10S 20 / 20 Pro and most other 3D printers. High quality product by MMOBIEL: all our products are d before shipping. Product in stock