High-quality precision sphygmomanometer - twin-tube model with black lacquered metal casing Life-long precision thanks to practically non-ageing and pressure-resistant measuring system up to 600 mmHg Stainless metal clamp for hooking the pressure gage to the cuff Precision air release valve with fine adjustment andwear-free Microfilter protects air release valve and measuring system Linear scale ø 49 mm from 0 to 300 mmHg Latex bulb for pumping up the cuff Maximum error tolerance +/- 3 mmHg In vinyl zipper case