Features: Upgrade your office chair with these smooth, quiet and casters. Our casters work on all floors and 't scratch or leave marks on any , including hardwood, carpet, tile, laminate, vinyl and more Easy to install: no tools required. Simply pull out the old caster and push in the new wheel until the caster is firmly seated and secure The new nylon locking chair casters are wear- and not prone to . Office chair wheels are heavy-duty design, with a maximum load capacity of 1,000 pounds, set of 5 Standard office chair casters measure 7/16 in x 7/8 in (11 mm x 22 mm). Chair slides are suitable for different swivel chairs (executive chairs, office chairs, gaming chairs, desk chairs) and are perfect to roll your stool or office chair into a more stable fixed position color: Black Material: Nylon Package Contents: 5 x casters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.