This Avantco 17817659 adjustable seismic leg works with select Avantco refrigeration units to ensure they're kept firmly in place. This adjustable seismic leg is the perfect solution for raising your equipment between 4 1/2" to 7" while keeping it firmly attached to the floor and in place. It's a direct replacement if one leg currently holding your unit is worn or broken. It is adjustable so that you can make sure your equipment is level on uneven floors.