Easily convert a standard task chair into a drafting chair with the Rapidline drafting chair kit | The 9 inch drafting kit for task chairs is supplied with a chrome foot ring and height extension tube | 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 but can be added at a later date | Backed by a 3 year warranty