Product Description: These silicone buffers serve to replace on your heating bed original springs. It is stable and does not shake when used, better to keep your 3D printer leveled. Feature: Assist 3d printer leveling Silicone: Heat-resistant and pressure-resistant Height: High 0.71"(18mm) Diameter: OD: 0.63 in ID: 0.16 in Color: Brown/Black Package Includes: 6x 18mm 0.71" silicone column 2x 16mm 0.63" silicone column Fit for Creality ender 3, CR10