Enhance your workspace with our 55mm premium replacement casters designed specifically for the Steelcase Criterion and other older model chairs. Smooth & Quiet Rolling: Glide effortlessly over carpet and soft flooring with our noiseless chair wheels. Heavy-Duty & Durable: High-quality construction supports a minimum of 500lbs, perfect for heavy-duty use. Smaller Size: Made to fit the Steelcase Criterion / Rally / Sensor / Protege and other older model chairs. Pinless Available: Pinless option available for chair bases with welded caster pins/stems. Set of 5 Casters Included: Upgrade your entire chair for enhanced mobility and comfort.