【Material】: The wheels are made of soft rubber and TPE material, ultra-quiet, won't disturb anyone during work, have high elasticity, and offer 360° flexible use. 【Bearing Design】: Ball bearings, integrated bearing, steel ball joint design, sealed bearing has low friction resistance, flexible bearing, can rotate 360 degrees, stable, high temperature resistance, high speed, dustproof and non-stick coating, and can be used for a long time. Built-in silent bearings, very quiet and durable. It is the perfect choice for any DIY furniture with moving wheels. 【Suitable for various floors】: Made of soft rubber, which is gentle and does not damage the floor. Rubber wheels have elasticity, toughness, and durability. Suitable for all types of floors, such as ceramic tiles, cement floors, marble, carpets, parquet floors, etc. Features: • There is no brake; 360-degree rotation allows completely free movement and the usability is stronger. • The wheels are made of soft rubber and rust-resistant TPE material to improve strength and durability. • Suitable for various floors. • Built-in sound-dampening bearings, quiet movement. • Material: Soft rubber and TPE • Color: Black • Wheel diameter: 40 mm • Thread: M8 x 15 mm • Load capacity: 20 kg per wheel. Package contents: 4 x 40 mm wheels, with M8 x 15 mm threaded rod