Features: brand new and high quality Upgraded version of aluminum hand-tight leveling nut: It is made of high-quality aluminum and has a longer service life than the original plastic nut. The torque of the hand-tightening nut is large, which is convenient for fine adjustment of the heating bed. High quality: 3D printer spring is made of spring steel, which is harder, more durable, more durable and reusable. This 3D printer hot bed leveling kit has springs and screws, you can choose according to your needs. The high-quality leveling knob kit makes the printer more stable, and the hot bed is more stable during printing. Compatibility: for most 3D printer beds, very suitable for Creality Ender and Cr10 series Specifications: Item Type: Leveling Modules Color: Red & Golden Weight: 76g Size: Please See the Pictures Material:Aluminum Screw: M4 Package Includes: 4 pieces x Springs 4 pieces x Screws 4 pieces x Nuts note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment.