If your BP unit has a bulb on one tube and a gauge on another tube you have a "Standard" type sphygmomanometer and you need to buy a 2-tube bladder set. You will receive a Cotton cuff with velcro closure, 2 tubes. No connectors or other parts are included at this close-out price of $7.00. Size of the cotton cuff is 5 inches by 21-3/4 inches. Bladder is appropriate size to fit this size bladder. For use with regular size people. We have some 1-tube units as well we'd be willing to sell for this price.