MATERIAL: Made of polypropylene (PP) and steel, sturdy and durable, avoid scratching the floor and carpet SIZE AND LOAD CAPACITY: 50mm diameter wheel, 360 degree rotating top plate 38 x 38mm, mounting height 60mm, load up to 30kg per swivel wheel LOCK DESIGN: When the swivel wheels are locked, the furniture stays in place and does not slip during use PERFECT FOR: Chairs, sofa, bench, ottoman, coffee table, plant stand, shoe box, toy box and TV stand Product Description The 360 degree swivel wheel allows for smooth and easy movement without squeaking or making noise. 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 box, toy box and flower 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 p> Package