Check the listing for details. Officemax Office Depot Chair Carpet Casters Wheels Rollers Tires 5pc Set #CH-55. Condition: New. Listed at 16.99 USD. Officemax Office Depot Chair Carpet Casters Wheels Rollers Tires 5pc Set Style: Standard hooded twin / dual wheel caster 5 pc setWeight carrying capacity: 110 lb. each casterWheel type: Hard nylon plastic for use on carpeted floors and floor matsWheel diameter: 2.16” (55mm)Stem type: Metal Grip ringStem length: 7/8” (22mm)Stem diameter: 7/16” (11mm)Barrel / Neck diameter: 38mm Color: BlackThis style of casters are the most commonly used in the industry. The slightly larger diameter wheels offer better mobility, carry more weight and will last longer than standard 50mm wheel diameter casters. They will fit any and all chair bases regardless of manufacturer. All casters should be replaced at the same time for safe, smooth rolling. Determine correct stem diameter by removing a caster from the leg of your chair base. As long as your existing casters have 7/16” (11mm) diameter stem, you’ll be able to use our casters as replacements.