Features: 1. Load capacity: 27kg per wheel. The roller rivet is thickened and reinforced, it can rotate at a high speed and is non-slip at the same time, which is silent and not easy to rub 2. Rust proof: The overall surface is chrome-plated, which can effectively prevent rust. 3.Material: The wheels are made of rubber that is flexible and will not damage the floor. Suitable for all types of floor coverings (laminate, wood, tiles, glass, carpet, concrete, marble, etc.) 4. Material: The wheels are made of rubber that is flexible and will not damage the floor. Suitable for all types of floor coverings (laminate, wood, tiles, glass, carpet, concrete, marble, etc.) 5. Multi usage: These castors with brakes are ideal for a variety of DIY and industrial applications. The wheels can be used in homes, schools, garages, shops, shopping trolleys. Perfect castors for furniture and other small moving furniture such as benches, coffee tables, trellis, bookcases, shoe baskets, toy baskets, shopping carts, workbenches, bed frames and more. Specifications: Material: Rubber Color: Silver Size: (Approx)(DiameterxWidth)50x17mm/1.97x0.67inch Screw size:(Approx)(Diameter x L)M1025mm/0.39x0.98inch Load bearing:27kg Mounting height:(Approx)67.5mm/2.66inch Rotating radius:(Approx)62.5mm/2.46inch Bearing:Ball (608) Mounting wrench size:(Approx)(L)14mm/0.55inch Package Included: 4pcs x Swivel Castors