General description Bell glides are designed to replace the rolling casters on office chairs, converting them into fixed chairs without compromising height. These glides are suitable for various types of chairs and stools, providing stability and support. 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: 15 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.