Sufficient content: this package contains 10 pieces extruder wheels in a pack, sufficient quantity to satisfy your various demands and replacements Check the dimension: each 36 teeth gear measures approx. 11 x 11 mm/ 0.43 x 0.43 inch (L x W), its inner diameter is approx. 5 mm/ 0.2 inch, 36 teeth, fit for most standard 3D printers; Please check whether the size is suitable for your needs before purchasing Practical function: our 3D printer parts can replace your broken one and make your printer work more efficiently, improve the performance and reliability for your 3D printers Good bearing capacity: these drive 36 teeth gears are made of quality stainless steel, rustproof and no corrosion, durable and stable to use, with good bearing capacity, allow for improving your printers' work efficiency Wide compatibility: our stainless steel extruder wheel gears are easy to install, compatible with for CR-10, CR-10S, S4, S5, Ender 3, Ender 3 Pro and most 3D printers Colour:silver Material:Stainless steel Package Contents: 10 * Extruder Wheel Gear Only the above package content, other products are not included. Note: Light shooting 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.