General description These 5Pcs Bell Glides Replacement Office Chair Wheels are designed to convert rolling office chairs into fixed chairs without compromising chair height. With a sleek design, they fit most small chair casters and provide a practical solution for stability in various settings. Technical specifications Overall Glide Height: 2 inches Insert Stem Dimension: 7/16 x 7/8 inch (11 x 22 mm) Bottom Width: 2 inches Material: PU and metal Color: Black, Gray Package Contents: 10 x Fixed Casters Measurement allowed error: +/- 1-3 cm Usage Can be used as fixed casters on wooden, metal, and tubular metal chairs, furniture, and other equipment.