Alvin 21" Chair Height Extension Kit for CH277, CH290, CH444, CH555, DC205 and DC207B

The Alvin CK49 Chair Height Extension Kit consists of cylindrical steel shafts, tapered to lock into the chair base and extra-strong foot rings. This extension kit adds approximately 7-1/2" to the height of the chair. Foot rings can be adjusted vertically and then locked at the desired height. It has a 21" diameter, black powder coated foot ring and black spokes. This CK49 Chair Height Extension Kit fit the following chair models CH277, CH290, CH444, CH555, DC205 and DC207B.