Dimensions: The bolts for the levelling feet are 6mm (diameter) x 15.5mm (height); the pad base is 23mm (diameter) x 13mm (height) and the total height is 28.5mm, please check the dimensions before purchasing Premium Material: The levelling foot base is made of composite soft rubber material, non-slip and wear-resistant, no sound when dragging. The screw is made of cold rolled steel, strong and durable, with deep threads that are not easy to slip, and can provide the maximum support force Easy to Install: If the furniture legs are threaded, you can screw directly into the levelling feet, if the furniture legs are not threaded, you need to drill a hole first, then tap in the T-nut (not included), and finally screw the leveller to the height you want. Stable and Quiet: The swivel levelling feet prevent furniture from swaying on uneven floors and reduce vibration. The swivel levelling feet also protect floors from scratches. Versatile Use: Adjustable feet can be used for tables, chairs, shelves, kitchen cabinets, plant stands and more. Whatever your home or workplace needs help with, they're a quick fix without sacrificing appearance. Test