Upgrade your chair casters and stand out at the office with these XL size premium office chair wheels. These rubber chair casters feature universal standard stem size: 7/16 " x 7/8 "(11x22 mm) and are suitable for 99% office chairs brands of Miller Steelcase, Aeron, Herman, Dxracer, Humanscale Freedom, Lazyboy, Serta, Hon, Boss, and more. IMPORTANT: Not for 1KEA chairs. Slipstick premium office chair caster wheels feature floor protecting twin 3-inch rubber rollerblade style wheels that will not scratch, damage, mark or smudge your flooring providing safe and smooth chair rolling over hardwood, vinyl, laminate, lvt, lvp, linoleum, parquet, tile, concrete, low pile carpet / rugs, and more. Featuring a new heavy-duty design and high-quality components, this set of 5 heavy duty chair wheels have a 650 pound (297kg) static load capacity and 500 pound (227kg) moving load capacity. Great as upgrade or replacement wheels for office chairs, gaming chairs, rolling stools, desk chairs, computer chairs, dental chairs, and rolling furniture fitted for 7/16” x 7/8” stem caster wheels. These 3-inch rubber office chair wheels feature jumbo dual rollerblade style wheels made of highly durable soft rubber that provides greater surface contact for maximum chair floor protection and a precision ball bearing design for smooth and quiet rolling, full swivel action, and optimal maneuverability. Unlike other similar looking desk chair wheels, Slipstick premium office chair wheels have precision ball bearings which provide a smoother, quieter, & more maneuverable chair rolling experience. Designed with floor protection as a priority, these rubber casters are ideal floor protecting office chair caster wheels for hardwood floors and make great replacement wheels for office chairs, stools, a computer chair, desk chair, gaming chair, dental stool, or any rolling furniture piece fitted for 7/16 inch stem caster wheels. Covered by a 5 Year free replacement warranty.