Material of castor wheelsThe casing is made of sturdy sheet steel, and the wheel is made of soil-friendly polymer PU. The mini transport wheels are super wear resistant. No scratches or wear caused by movement on the floor. Soft and Quiet]Small wheel casters are hard and durable. The swivel wheels are supplemented with a thickened plate, which provides smooth, safe and quiet transportation of furniture on laminate floors and carpets. Rubber wheel size solidCastor diameter: 25mm, total height: 28mm, mounting plate: 42mm x 19mm, screw holes: 4mm. Package includes: 8 white furniture caster wheels + 16 screws, Load capacity: 40 kg. Sliding castersMini casters feature resistance to fatigue, crack resistance and other characteristics. The swivel wheels have a rivet joint to prevent them from falling off. Non-toxic, odorless, safe, environmentally friendly and long service life. Wide ApplicationFurniture castors small ideal for drawers, chairs, wheelbarrows, tool boxes, furniture, luggage, etc. Mini rubber casters for small furniture can be used in households, shops, schools and hospitals.