Transform your office chair mobility with ALTRA's premium 3-inch rollerblade-style caster wheels. This set of 5 heavy-duty wheels provides smooth, quiet rolling on any surface while protecting your floors from marks and scratches. Built with industrial-grade bearings and sturdy steel brackets, these casters can support up to 650 pounds collectively. The wheels feature universal stems (7/16" x 7/8") that fit 99% of standard office chairs, though note they're not compatible with IKEA chairs. Each wheel is engineered for durability and performance, offering superior maneuverability whether you're gliding across hardwood, carpet, or tile. The robust construction ensures stability and longevity, while the sleek black and silver design adds a modern touch to your office furniture. These replacement casters will significantly upgrade your chair's mobility, making your workday smoother and more efficient. Please verify your chair's stem measurements before purchasing to ensure proper fit.