4-pack 40mm rubber casters with M8 threaded rod 【Material】: The casters are made of soft rubber and TPE material, extremely quiet, does not disturb anyone during work, high elasticity, 360° flexible use. 【Bearing design】: Ball bearing, integrated bearing, steel ball guide design, sealed bearing has low friction resistance, flexible bearing, can rotate 360 degrees, stable, high temperature resistance, high speed, dustproof and non-stick, and can be used for a long time. Built-in silent bearing, very quiet and durable. It is the perfect choice for any DIY furniture with moving wheels. 【Suitable for a variety of floors】: Made of soft rubber, which is soft 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 can be completely free to move, and the usability is stronger. The wheels are made of soft rubber and stainless TPE material to improve strength and durability. durability. Suitable for various floors. Built-in silent 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 swivel wheels, with M8 x 15 mm threaded rod