Small heavy duty rubber swivel casters. Heavy sheet steel - 360 degree swivel furniture casters. Load capacity 40kg (10kg per castor) - 2 with frons and 2 without frons Rubber wheels have the elasticity of wheels and the toughness and durability of metal wheels. Safe for all floor types: Our casters are ideal for all floor types Floors (laminate , wood, tiles, glass, carpet, concrete, marble, etc...). You don't have to worry about leaving marks on kitchen tiles, laminate floors or even expensive carpets getting bitten by poor quality wheels. Universal: Swivel casters with brakes are ideal for a variety of uses, from household to industrial applications such as: home, school, trolley, garage, shop, cart, hospital, factory Carts, tool boxes and lightweight mechanical casters are ideal for small to large equipment and small space furniture including: display equipment/ stands, carts, footstools, coffee tables, plant stands, trays, gardens, shelves, shoe boxes, toy boxes, trolleys, workbenches, under-bed workbenches, planters or table saws. Wheel diameter:1.5inch(38mm) package: 4pcs