Material: 3D printer heat bed parts are made of heat-resistant silicone, solid bed mounts is very stable, not shaking, heat-resistant and pressure-resistant Function: larger surface than spring, reduce shock, heed silicone leveling column better to level your 3D printer; Heat bed silicone leveling help cutting back any vibrations compared to solid plastic Size: the outer diameter 16 mm/ 0.63 inch, inner diameter 4 mm/ 0.16 inch, height is 18 mm/ 0.71 inch; This heat-resistant and pressure-resistant silicone leveling column with a 4 mm inner diameter makes it eer to level your 3D printer Application: replace original spring leveling for 3D printer hot bed platform; Simple installation, no need complicated tools, convenient for using; The silicone buffers are simply installed instead of the original spring and it is no longer possible movement, your set levels remain Package includes: there are 8 pieces heat bed silicone leveling column, enough to meet your need, suitable for 3D printer hot bed and platform bottom connection, can replace the original spring leveling