Two tube, Infant Size, Blood Pressure Bladder for standard B/P units.
(Meaning that the unit has one tube for the bulb and one tube that goes to the gauge)
If your blood pressure unit needs only one tube to function see the following selection of
one tube replacement bladders
The replacement units slide back through the slot in the cloth cuff.
4 - 1/4" long x 2 1/8" high (+/-)
These bladders have many more uses than just for checking blood pressures. Many
hobbyists and inventors use these unit for different purposes.