Our Office Chair Wheels 10mm Stem are designed to be compatible with IKEA chairs. The 3/8" Replacement Rubber Chair Casters are made of solid steel stem and frame, with soft polyurethane casters that can withstand loads up to 650 lbs. The precise ball bearings in the caster swivel and axel provide smooth, easy rolling without any squeaky sounds. The casters are safe on any surface, leaving no scratches or marks on any flooring, including wood and hardwood, laminate, vinyl, tile or carpet. Installation is easy and no tools are required. 100% Satisfaction Service is guaranteed, and for any reason not, we’ll give you a full refund. Shop with no risk!