The Baumanometer© Desk Model features a large bore Mylar© Clad glass cartridge tube our Calibrated© V-Lok© Inflation System and a diecast aluminum alloy case * 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 *