VEE GEE Support Jack is an essential companion to any laboratory application requiring lifting and lowering of instruments or apparatus. Ideal for supporting glassware, stirrers, baths, hotplates, etc. Constructed of anodized aluminum with stainless-steel crossbars. Platform height is quickly and smoothly adjusted by an oversized knob. Platform is 5.5" x 4.5" with a vertical lift of 2.75" to 10.5".