Bodymade Set of 5 Universal Office Chair Caster Wheels - Standard Stem Diameter: 7/16", Stem Length: 7/8"

These casters will fit most office chairs that are available worldwide. Major office furniture manufacturers worldwide have been using standard size casters for many years now. These casters fit that standard. They feature a steel 7/16x7/8 Grip Ring stem. The Grip Ring system means you won't have to worry about the casters falling out of the chair base when you roll around. The wheels themselves are made of durable heavy duty urethane. This allows them to roll with ease on most carpeted surfaces. Also, the material and design prevents them from scratching most hardwood floors. If you are replacing old casters, simply pull them out of the chair base and pop these new casters right in. It is that simple. You should feel at ease knowing you are getting a quality product that is designed with the user in mind.