Suitable for 3/3 Pro/3 X, 5/5 Plus/ 5 Pro, -10, -10 V2, -10 Max, 10, -10 Mini, -10S, 10S Pro, -10 Plus, -X, 20. Upgraded aluminum manually twisted horizontal nuts to make hot bed flat, and processing technology makes printing platform more stable. Can be used for many years. Made of high-quality material, nuts have a longer service life. Metal nuts are stronger and twist tighter than plastic nuts. These nuts have a large torque, making it easier to fine-tune hot bed. Upgraded bed level spring, more rigid and accurate bed leveling. colour:Red+blue Material:aluminum size:Nut: 60mm diameter, Spring: 8 x 25mm Package Contents: 4 x Hand Twist Leveling Nut 4 x Hot Bed Spring Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.