One tube, Adult Size, Blood Pressure Bladder for one-hander 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
two-tube blood pressure bladders.
The replacement units slide back through the slot in the cloth cuff.
8 - 3/4" long x 4 3/4" high (+/-)
These bladders have many more uses than just for checking blood pressures. many
hobbyists and inventors use these unit for different purposes.