DescriptionMade from premium latex, our product is reliable and durable. Instantly responsive. Smooth operating and long wearing. Designed to inflate large inflation systems rapidly. Suitable for sphygmomanometer, cervical traction, inflatable pillow, massage cushion, nasal cleaning device, etc.Features-Color: Black -Material: Latex, Aluminum Alloy -Size: 11.00X5.00X5.00cm/ 4.32X1.97X1.97in-Manual blood pressure ball made from premium materials, durable and convenience to carry. -Blood pressure ball is comfortable designed for daily use and multiple measurements. -It is lightweight, small design is easy for storage, give you an nice use experience. -Easy to operate, and the air release valves can easy to control when you monitor the blood-pressure. -It is widely used in medical institutions, clinic, even can be used at home.