MySit 10mm Stem Caster for IKEA Office Chair Wheel, IKEA Caster Wheels Replacement (Pack of 5) Used to Replace 10mm Stem Casters in Ikea Chairs, Stem Size: 10x22mm BIFMA Quality, Heavy Duty, Maximum Weight Rating: 100lb/wheel,500 lbs as a set of 5 Rubber wheels protect hard wood floor surface from scratches for Ikea 10mm Stem Caster only Regular 11mm Stem Caster User Please Buy Assin B01FCQJ4GM or B07B7DR8TN NOT Compatible with Regular 11mm Diameter Stem Caster, Please Measure the Stem size of the old caster before buying in case of wrong specification.