Specification: Material: thermoplastic elastomer (TPE) + steel Size: caster diameter 25mm / 32mm / 38mm Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 2. Please allow slight dimension difference due to different manual measurement. Thank you for your understanding. Package Including: 4 x Furniture casters wheels 1 Set of screw Mini Casters:Made of durable thermoplastic elastomer (TPE) and steel. The surface is chrome plated to avoid rust and corrosion, and can be used for a long time. Rugged and Durable : Each wheel is equipped with ball bearings and strong load capacity; the dimensions of the L-shaped plates are approximately 32 x 25 mm (L x W) and the mounting height is approximately 39 mm; the load capacity is 11 kg per caster, with a maximum load capacity of 44 kg per package of 4pcs casters. Unique Design : Five horizontal mounting holes are used to fix the guide rail, which is not easy to deform; expand the angle to make the mounting plate more stable; tight L-shaped mounting plate saves space and is easy to install; the corners were reinforced to make the mounting plate more stable. Floor Protection : Thick rubber material, environmentally friendly, no odor, soft texture, non-slip and wear-resistant, protect the floor, effectively reduce noise when moving, and provide a quiet home environment for you and your family. Applications : Usually used in small projects and movable furniture, including dressers, boxes, under the bed lockers, shoe cabinets, toy boxes, cabinets, bookcases, easels, etc.