Specification: Thread Dia: M8 / 8mm / 0.31" Height: 20mm / 0.78" Base Dia: 28mm / 1.1" Base Height: 12mm / 0.5" Features: 1. The length of the screw can be adjusted according to the needs during the use. You can use these leveling feet to install your product feet. 2. They are particularly suitable for the product that is swaying during the use due to rough floors or bad leg of the product. It does not harm the floor and without noise during the use due to the plastic base. 3. It can protect your furniture, beautiful hardwood, ceramic tile and linoleum floors from marring and scratches. And the plastic base can keep them from sitting on the moist floor and it will not leave rust rings anymore all over your ground. 4. The adjustable leveling foot is for office or household furniture even industrial machine with threaded sockets. It is great accessories for DIY products. 5. Install it to increase the height of your product while improving the overall stability, decreasing the overall area of the product in contact with the ground, reduce frictional resistance, then move more effortless. Perfect Service: Dependability quality and customer satisfaction were first on our minds when manufacturingthis product. this product is recommended by furniture manufacturers and installers. You have any problems with our products, we will help you solve them fastest.