Material: Swivel casters are soft rubber wheels and TPE materials, super quiet, won't disturb anyone while working, high elasticity, 360 flexible use. Bearing design: Ball bearing, integrated bearing, steel ball steering 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 movable casters. Specifications: Drum diameter: 25mm / wheel width of each drum: 13mm / threaded screw height: 15mm compact in shape, including 4 casters with M6 threaded screw, and easy to install. Suitable for a variety of floors: Made of soft rubber, which is soft and won't damage the floor. Rubber casters have elasticity, toughness and durability. Suitable for all types of floors, such as ceramic tiles, cement floors, marble, carpets, parquet floors, etc. Wide range of uses: Casters cabinets are ideal for indoor or outdoor use. Mobile casters can be used in homes, lawns, factories, stores, businesses and hospitals. Swivel casters ideal for furniture and other small movable furniture (such as coffee tables, desks, shelves, shoe cabinets, shopping carts, transport carts). < p>Features: There is no brake, 360 degree rotation can be completely free to move, and the applicability is stronger. The wheels are made of soft rubber and anti-rust TPE material to improve strength and durability. Suitable for different floors. Built-in low noise bearings, silent movement. Material: Soft rubber and TPE Model: M6 Threaded Rod Movable Threaded Caster Color: Brown Size: Diameter roller height: 25 mm / 0.95 inch Wheel width of each roller: 13 mm / 0.51 inch Height of the screw thread: 15 mm / 0.59 inch Scope of delivery: 4* M6 Movable threaded screw castors