Tripp lites 2 9ustand tower kit accessory offers a convenient method of installing a tripp lite rack tower ups systems in a small footprint upright tower configuration pair of adjustable tower stands securely support single or multiple rackmount ups battery packs and other accessories in 2u to 9u widths it expands from 10u to 14u with the purchase of an additional set of 2 9ustands and is compatible with tripp lite smartonline and smartpro rack tower ups models specifying the use of this