FYSETC is focus on 3D Printing Accessories, offers a variety of quality 3D Printing parts. We are constantly improving its products to deliver the best experience to each customer. 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. Model: 3 high and 1 short silicone leveling column, brown Feature: Assist 3d printer leveling Material: Silicone Silicone: Heat-resistant and pressure-resistant Diameter: OD 0.63"(16mm) ID 0.16"(4mm) Height: High 0.71"(18mm), Short 0.64"(16.2mm) Package Includes: 3x high silicone leveling column, brown 1x short silicone leveling column, brown After Sales Guarantee: each one defective item can have the free replace or refund, need more help please feel free to email or Q&A us, we will try our best to service you.