This set of 4 swivel casters with double brakes will be the perfect accessory for small equipment and furniture like workbench, trolley, coffee table, plant stand, bookshelf, shopping cart, etc. These casters are made of rubber which is distinguished by a good shock and vibration resistance, enabling these casters to run smoothly and quietly. Additionally, their soft surfaces effectively protect your floor from scratching. Besides, the zinc-coated iron frame is highly rust-resistant and thus adds to the catser's sturdiness and durability. These swivel casters are equipped with double brakes for flexible control. Each caster has a maximum loading capacity of up to 396.8 lb. Delivery includes 4 swivel casters with double brakes. Colour: Black Material: Rubber and zinc-coated iron Caster diameter: 7.87 " Plate size: 5.31 x 4.13" (L x W) Maximum loading capacity: 396.8 lb (each caster) Delivery includes 4 swivel casters with double brakes California Proposition 65