About this itemProduct Dimension(Each): Screw Dia:6mm/0.24"; Screw Length:20mm/0.79"; Total Length:27mm/1.06"; Base Dia:18mm/0.71"Material: Saim Adjustable Feet is made of PP, Nylon, and steel which is corrosion and abrasive resistance, not easy to rust.Easy Assembly: This levelling feet is threaded at the edges to increase friction and ease of installation and removal, and the plastic base design for prevent furniture legs from scratching the floor and reduce noise while moving furnitureDIY Design：you can DIY your furnitures with this table leg extenders, the height of this legs can be adjusted with the real situation.Widly Use: Adjustable Table feet can be used for tables, desks, chests,chairs,benches and other various furnitures.