It is a precisely calibrated clinical sphygmomanometer, designed for medical practitioners who require a strong, lightweight, portable instrument that offers scientific accuracy and years of trouble-free service. Like all Baumanometer instruments, it is backed by our manufacturer's guarantee. The case is made of lightweight aluminum alloy. The instrument color is Neutral Gray textured baked enamel. The aluminum scale has large white epoxy numerals on a black anodized background.