The Desk Model is a rugged unit designed for the doctor's office or for a medical clinic. It has a special locking device to prevent the loss of mercury when not in use. The unit has a 300mm scale and comes with a grey velcro cuff, inflation bulb and bladder which can be stored in the metal case. This mercurial desktop sphygmomanometer is encased in an alloy zinc shell which enables the unit to be folded down for convenience. Manufactured and developed in Japan.