BF BRIGHTFIELD Universal Office Chair Caster Wheels Set of 5 Swivel Vertical Axle Heavy Duty & Safe for All Floors Including Hardwood 3" Rubber Replacement for Desk Floor Mats

✅ UNIVERSAL STEM SIZE - 7/16" (11mm) x 7/8" (22mm)- fits office chairs sold in the USA with 11mm stems. Protect your expensive hard wood floors and carpets without damage. Our soft polyurethane material casters are guaranteed not to scratch or leave marks on any surface. ✅ HEAVY DUTY CONSTRUCTION. Our revolutionary design chair wheels are made of polyurethane chair casters, industrial-grade steel, they can support loads up 850 pounds! ✅ SMOOTH & QUIET. It is smooth and quiet rolling; new design with dustproof top cover and the 3.5 inch bearings combined with vibration reducing polyurethane tires will roll smoothly and silently. ✅ REVOLUTIONARY DESIGN: Design with new type bearings, dustproof cover and 100% nylon stand, have solved that traditional chair wheels get tangled with carpet, hair, and scratches on floors. ✅ VERY EASY TO INSTALL: Following the instruction of installation, pull out your old office chair casters and push in your new wheels without tools., Manufacturer: BF BRIGHTFIELD