Alvin® 21" Diameter Black Ring

Height extension conversion kit. Description These convenient height extension kits convert Alvin office-height chairs into drafting-height models. Each kit includes a strong cylindrical steel shaft with tapered end that locks into the chair base. Foot rings can be adjusted vertically and then locked at the desired height. It is recommended that extension kits be attached when the chair is first assembled. ^Suggested List""~56.00"