Overall glide height: 2 inches when installed, compatible with most small chair casters; these stool office chair glides can convert a chair with casters into a stationary chair without altering the chair height. Insert stem dimension: standard 7/16 x 7/8 inch (11 x 22 mm) grip ring mounting stem fits most standard chair or stool bases; ensure to measure your existing size before purchasing. Glides size: 2 inch bottom width and 2 inch overall height, designed to match the size of most small chair casters. Practical design: solid PU construction provides durable support for desk chairs, workshop chairs, stools, and other seating; black top with gray bottom offers a neutral look that complements various chair styles. Wide application: suitable for use on wood, metal, and tubular metal chairs, furniture, and equipment to provide stable, stationary support. Color: black, gray Material: PU, metal Size: approximately 52mm Package Contents: 5 x Fixed Stationary Glides Note: The package includes only the items listed above. Light and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.