Features: Special designed for Ender 3 and CR10/CR10S 3D Printers. This heat-resistant and pressure-resistant silicone leveling column with a 4mm inner diameter makes it better to level your 3D printer. High temperature resistant, you can set temperatures up to 200 degrees above the temperature of the pressure. They are made of heat-resistant, non-stick silicone material and we will repel the accumulation of molten plastic. It has better stability than the spring, and the hot bed platform can be adjusted freely. For 3D printer hot bed platform, bottom connect, they can replace original leveling springs. Package Includes: 1Set/4Pcs Leveling Column Specifications: Item Type: 3D Printer Hot Bed Leveling Column Model Number: 18mm/ 0.71in Material: Silicone Color: Black Features: Stable, Not Shaking, High Temperature note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.