One tube, Thigh size, Blood Pressure Bladder for standard B/P units.
(meaning that the unit has a bulb and gauge as a single unit)
If your Blood pressure unit needs two tubes to function see the following selection of one-tube blood pressure bladders.
The replacement units slide back through the slot in the cloth cuff.
15" long x 7 1/2" high (+/-)
These bladders have many more uses than just for checking blood pressures. Many hobbyists and inventors use these unit for different purposes.