[Perfect for All Floors] - Made of nylon rubber, these casters are designed to protect hardwood floors, laminate, tile, slate and all other hard floors from damage and scratches. [Fits Ikea chairs only] - Please make sure the axle size of the chair is 10 x 22 mm, otherwise these office chair casters will not fit the chair. [Disassembly and Silence] - Smooth and quiet gliding are priorities for office chair casters. These casters are very flexible when rolling up the chair; There is not much noise with premium rubber, a good choice for the office. [Heavy-duty terracotta casters] - Each caster can bear up to 50 kg and the whole set of 5 casters can bear a maximum weight of 250 kg, safe and stable for all people. [Easy Installation] - Just follow the instructions with a few simple steps, so good, no tools are needed for installation, easy for everyone.