What is this? These are solid bed mounts. They are intended to replace the springs under the heated bed. Is there any advantages of the product? These silicone columnar serve to replace on your heating bed original springs and it is no longer possible movement your set levels remain How to use it? To install this part an automatic leveling sensor is needed. please remind the install position is in the side which has power cable. What should I notice? The silicone leveling column Model is 3 high and 1 short (don t include Print firmware).