Raindrop World Blood Pressure Monitor Arm Cuff Rubber: Raindrop World is universal size monitor rubber cuff available in the market. This Cuff is compatible with all Major Blood Pressure Monitor. We provide multi patient use as well as disposable BP cuffs. Rubber BP Bladder is an important medical product connected to Blood Pressure Measurement Equipment for checking BP level of patients. The bladder is the inflatable bag inside of double layers of material of the BP cuff.