MATERIAL: Made of polypropylene (PP) and steel, sturdy and durable, avoiding scratching the floor and carpet SIZE & LOAD CAPACITY: 50mm diameter wheel, 38 x 38mm 360 degree swivel top plate, 60mm mounting height, load up to 30kg per swivel wheel LOCKING DESIGN: When the swivel wheels are locked, the furniture stays in place and won't slide around during use PERFECT FOR: Chairs, sofa, bench, ottoman, coffee table, plant stand, shoe bin, toy bin and TV stand Product Description The 360 degree swivel wheel allows for smooth and easy movement, without making any squeaks or noises. When the casters are locked, the furniture can be held in place; When the casters are unlocked, the furniture can be moved freely. It is perfect for chairs, sofa, bench, ottoman, coffee table, plant stand, shoe bin, toy bin and TV stand. Specification: Material: PP and steel Load capacity: 30kg per caster Total height: 60mm Wheel diameter: 50mm Plate size: 38 x 38mm (L x W) Hole center distance: 25.4mm Package