【UNIVERSAL FITS 99% CHAIRS】 Swivel chair casters fit most office chairs as well as computer game chairs, office chairs, gaming chairs, executive chairs, swivel chairs, office chairs or office chairs. There are many kinds of brands that are compatible with our office chair casters, such as Herman Miller Steelcase, Aeron, Dxracer, Humanscale co.ukeedom, Lazyboy Serta, Hon, Boss, etc. , shank length: 7/8 ) 【QUIET】 The hard floor castors are made of high quality steel and are absolutely sturdy. When you slide the hard floor casters onto your office chair, you will hear absolutely no noise. Even if you are working or playing at the home office at night, no one will be disturbed because no one can hear you. 【SECURE FOR ANY SURFACES】 Hard Floor Casters protect your floor long term with the durable soft polyurethane edge. Scratches, cracks or other damage will never show on your floor, and our smooth swivel casters also ensure that no dark or black marks will be scratched or left on any