and high qualtiy. Suitable for most 3D printer heated bed, the die springs are stiffer than ordinary spring, which help your 3D printer much more stable while printing. The torque of these nuts is large, making it easier to fine tune the hot bed. Light weight and anti-rust, easy to carry. Apply for: Suitable for most 3D Printer heated bed, compatible with for Ender 3/3 pro/3 X, for Ender 5/5 plus/ 5 pro, CR-10, CR-10 V2, CR-10 max, CR 10, CR-10 mini, CR-10S, CR 10S pro,CR-10 plus, CR-X, CR 20. Product Name:4pcs Blue 37.7mm Aluminum Hand Twist Leveling Nut with 4pcs Hot Bed Die Springs with 4pcs Screws, Compatible with for Ender 3/3 pro, for Ender 5/5 plus/pro, CR-10, CR10S/10S pro, CR 20 3D Printer Hand Twist Leveling Nut Material:Aluminum Spring Material:Spring steel, M4 Screws:stainless steel, Make the print platform easier to level Model:Aluminum hand twist leveling nut Type:Screw Nut Colour:Blue Material:Aluminum Alloy Package Contents: 1set * leveling kit