About This MATERIAL: The supporting frame is made of steel, wheel is made of wear-resistant rubber, and the foot base is made of NBR SIZE & LOAD CAPACITY: The stem is 12 mm in diameter, 25 mm in height; each leveling caster can take a weight of 550lbs EASY TO ADJUSTMENT: Manual thumb wheel design or nut for open-ended wrench make it easy to retractable, With a built-in ratcheting system, user can adjust the height from 3.5" to 3.75" FUNCTION: Through raise or lower the anti-vibration foot you can make your machine or workbench completely stationary on uneven floor and have the ability to move it easily into position when you would like to GREAT FOR: Heavy work benches, Heavy machine equipment, Kitchen island, Welding table, working on the table with a grinder and a hammer Overview Color : White Brand : Skelang Material : Aluminum, Nylon, Rubber, Steel Item Weight : 5.7 Pounds Mounting Type : Stem Mount