OverviewMATERIAL Single Wheel caster are made of PP material and consist of heavy duty steel construction DIMENSIONS AND LOADING CAPACITY Each caster wheel carry up to 88 lbs capacity With 2 diameter ball 360 degree stem 031 inch x 15 inch8mm x 38mm WL DURABLE CHAIR WHEELS REPLACEMENT Casters are made of plastic and steel You will get 4 PCS wheels It provide years effortless 360 Degree swivel roll smoothly and durability You just need to paste the stainless steel mini caster wheels on the bottom of the box then the heavy box can be easily moved and the silent pulley wheels are stable and quiet will not scratch the ground which is not easy to shake when pushing and it is better to disperse the force and load These cute casters not only be applied to the storage boxes trash cans small boxes of storage for easier moving but also a nice DIY accessory suitable for kids toy art craftworks and more with a maximum load of 8 kg