These swivel roller office chair casters are perfect for indoor hardwood floors, tiles, and carpets, and can be used as replacement accessories for movable chairs. It is suitable for most existing office chair models, such as salon chairs, office chairs, rolling stools, etc. It is also very suitable for home or office use and can be used for a long time.SpecificationColor: BlackMaterial: NylonHeight: 55 mm/2.2 inchWheel Size: 30 x40 mm/1.2 x 1.6 inch(W*Dia)Hole Dia: 4 mm/0.16 inchSize Between Holes: 25 x 25 cm/1 x 1 inchPlate Size: 30 x 30 mm/1.2 x 1.2 inchPer Wheel Load Capacity: 15 kg/33.1 lbsPacking List: 8 Pcs Office Chair Wheels ReplacementAdvantageThe plastic caster replacement wheel is made of nylon with a smooth surface, high hardness, and large load-bearing capacity. It can rotate 360° at multiple angles, rolls very smoothly, effectively protects the floor from scratches, moves quietly and smoothly, and reduces noise.InstructionThe office chair casters are easy to install and simple to use. You just pull out the old wheel, then push the rod of the new office chair wheel into the slot until it is firmly fixed.Note: Please confirm the size before placing an order and choose the chair wheel of the corresponding size.