Signia Hearing Aid Battery Size 312, Pack of 30 Batteries

HIGH PRECISION GAUGE: This high precision gauge is made with zinc alloy which makes it more durable.It is pressure tested for maximum repeat accuracy. It has a clinical accuracy of +/- 3 mmHg with 0- 300 mmHg manometer. Gauge has a metal clip at the back to make testing hassle free.
INFLATION BULB WITH AIR RELEASE VALVE: The inflation bulb is made of rubber and is crack resistant and non sticking The air release valve is chrome plated to avoid corrosion. The device has a dual-tube bladder for an efficient air release
COTTON CUFF WITH EXTRA WIDE VELCRO FASTENERS: It has a special cotton cuff which makes it very comfortable and pain free for the patient. It has extra wide Velcro fasteners for a firm grip and making it easy to use on all arm sizes.