ITEM NAME:4x Stable Heatbed Leveling Column OD 0.63" ID 0.16" Buffer Tube for Ender 3 Description: Model is 3 high and 1 short(don't include Print firmware). These silicone buffers serve to replace on your heating bed original springs and it is no longer possible movement, your set levels remain! This heat-resistant and pressure-resistant silicone leveling column with a 4mm inner diameter makes it easier to level your 3D printer. The silicone buffers are simply installed instead of the wobbly springs. It is stable and does not shake when used, better to keep your 3D printer leveled. Specification: Type: Dampers Tube Model: 3 high and 1 short silicone leveling column Feature: Assist 3d printer leveling Material: Silicone Silicone: Heat-resistant and pressure-resistant Diameter: OD 0.63"(16mm) ID 0.16"(4mm) Height: Hight 0.71"(18mm), Short 0.64"(16.2mm) Compatible with: for 3D Printer Ender 2, Ender 3 Features: Insulation Resistance, Good Performance, Durable Package Includes: 3x high silicone leveling column 1x short silicone leveling column SKU: DMO0009802177020638.Compatible with: for 3D Printer Ender 2, Ender 3. Model: 3 high and 1 short silicone leveling column. 3x high silicone leveling column. 1x short silicone leveling column. Feature: Assist 3d printer leveling.