Designed for professional use, the BIOS Diagnostics™ Aneroid Sphygmomanometer delivers dependable performance and precise readings. It features a 300 mmHg aluminium alloy manometer for accurate readings, an adjustable nylon cuff for optimal fit, and a high-quality two-tube PVC bladder and bulb. The dual-use air-release valve and taper end valve ensure smooth, precise control during measurement. Features: Designed for healthcare professionals 300 mmHg aluminium alloy manometer Adjustable nylon cuff High-quality 2-tube PVC bladder and bulb Dual-use air-release valve with spring Taper end valve Compact for easy travel Contents: Sphygmomanometer, nylon cuff (size marked on box), storage bag, and instructions (stethoscope sold separately) Model # Size Arm Circumference Range BD901 Small 18.4 – 26.7 cm (7.2” – 10.5”) BD902 Standard 25.4 – 40.6 cm (10” – 16”) BD903 X-Large 33.3 – 51.0 cm (13.1” – 20.1”)