Stadi-O-Meter Growth Measure Wall Unit Stadi-O-Meter measures with guaranteed accuracy (ñ 1/16 ) from 30 to 84 * Durable steel construction installs in minutes * Comes with a magnetically attached flip-down measuring arm (with breakaway design) to insure an extra measure of safety * Measures with guaranteed accuracy from 30 to 84 * Easy-slide flip-down measuring arm with magnetic attachment for added safety * Durable high-quality formed steel construction with durable finish * Easy assembly and mounting *