Usage Tips:What You Get 4pcs square leveling feet, 4pcs tube inserts. Suitable for square furniture feet with outer diameter 30mm x 30mm. Product Size Tube Insert Size: 30mm x 30mm x 18mm/ 1.18 x 1.18 x 0.7 (L x W x H) Leveling Foot Diameter: 40mm/ 1.57 Thread Diameter: 8mm/ 0.3. Premium Material Leveling feet are made of PP plastic, strong wear resistance, good toughness, not easy to break. The screws are made of metal with galvanized surface, no rust and strong load-bearing capacity. Wide Application Leveling feet are suitable for office furniture or household furniture with threaded sockets, such as fitness equipment feet, clothes rack support feet, table feet, chair feet, shelf feet, etc. Feature 1. thickened plastic material, strong and durable, strong load-bearing capacity. 2. Anti-slip and silent, protect your floor from scratching. 3. Adjust the height of the furniture at any time to maintain a better balance and make the furniture height to match your needs. Specifications: Color: Black Material: Plastic Metal Tube Insert Size: 30mm x 30mm x 18mm/ 1.18 x 1.18 x 0.7 (L x W x H) Leveling Foot Diameter: 40mm/ 1.57 Thread Diameter: 8mm/ 0.3 Package Included: 4pcs x Square Leveling Feet 4pcs x Tube Insert