These polyurethane office chair casters are designed for universal compatibility with most standard chair bases. The 2inch wheels feature a circlip retention system and are available in stem sizes of 10 mm or 11 mm, with the circlip variant noted as CirclipWhite11mm. Packaged as a set of 5 pieces, they are built for largeclass, heavyduty chairs while delivering smooth, quiet rolling and floor protection. Key attributes Size and compatibility: 2 inch diameter wheels; stem diameters 10 mm or 11 mm; circlip retained design for secure mounting; CirclipWhite11mm variant. Material and construction: quality polyurethane tread for durable, smooth rolling. Performance: quiet operation to minimize workplace noise; floorfriendly to reduce scuffs and marks on wood, tile, or laminate flooring. Durability: designed for largeclass, heavyduty chairs that require robust wheel performance. Packaging: includes 5 caster wheels per pack. Functionality and benefits Quiet, smooth movement: polyurethane wheels roll quietly across most floor types, helping maintain a calm work environment. Floor protection: the PU tread minimizes marks and scratches on hard flooring, preserving surfaces over time. Easy compatibility: options for 10 mm or 11 mm stem sizes broaden compatibility with many standard chair models. Secure installation: circlip retention ensures a stable fit once mounted, with a white Circlip11mm variant providing clear retention. Specific use cases Home or office chair replacement: swap worn wheels for a quieter, smoother glide and better floor protection. Conference or reception areas: upgrade chairs used on hard floors to reduce noise and improve mobility during meetings or guest seating. Largeclass or heavyduty chairs: suitable for chairs that require durable wheels with reliable rolling performance and reduced floor impact. Note: This set is designed to align with chairs that use 2inch polyurethane casters with circlipretained stems in sizes 10 mm or 11 mm, and the CirclipWhite11mm variant refers to the white circlip size specified. The pack contains five pieces.