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Review Summary
The Alvin CK55 Teardrop Style Height Extension Kit comes with strong cylindrical steel shaft with tapered end to lock into the chair base. It adds approximately 7-1/2" to the height of the chair. The foot ring models can be adjusted vertically and then locked at the desired height. This CK55 Chair Height Extension Kit fit CH277, CH290, CH444, CH555, DC205 and DC207B chair models.