General description Used to convert a swivel office chair with casters into a fixed chair without losing the chair height. Ideal for transforming a rolling chair or rolling stool into a fixed chair with glides while maintaining the overall height of the chair. Technical specifications Standard stem size: 7/16 in x 7/8 in (11 mm x 22 mm) Glide height: 2 inches Bottom Width: 2 inches Top Width: 1.33 inches Color: Black Material: Metal + Nylon Package Contents: 25 pcs Universal Casters Measurement allowed error: +/- 1-3 cm