GN 20 levelling feet without mounting holes are certified according to 3-A Sanitary Standard Inc. guidelines and are intended for use in hygiene areas. The bottom seal protects the area beneath the foot plate from dirt. For this, the foot must be pressed down by the weight of the machine. The sealing ring above the adjustment sleeve enables fastening without dead space. Due to the wiper or the ball seal, the moving components are sealed against the environment. The high quality finish prevents adherence of dirt and facilitates cleaning.