Product Description Feature: Useful functions: These silicone buffers serve to replace on your heating bed original springs.It is stable and does not shake when applied, better to keep your 3D printer leveled.Specifications: Height: 18mm silicone leveling column Material: silicone Color: black Package includes: 8 x 18 mm Heat bed leveling silicone columns Note: Manual measurement, please allow little size errors.The mention of brand names and any related models above is only for purposes of demonstrating compatibility.