This product is a single caster wheel. It has an 8 - inch diameter, 1 - inch width, and 10 - inch length. The item is in great used condition. Note that the item you receive may not be the one in the picture.
Using these caster wheels is easy. Just attach them to the equipment or furniture where you need mobility. When using, make sure the surface is relatively flat to avoid uneven movement. Also, don't overload the wheels beyond their capacity. For maintenance, clean the wheels regularly to remove dirt and debris. Check the bearings from time to time, and if you notice any unusual noises or difficulty in rolling, it might be time to lubricate them.
