Since the GAMMA XXL LF is non-mercurial, it is both safe and environmentally-friendly. Latex-free. Durable polycarbonate construction. Will hold up in the busiest hospital and practice environments. Oversized 130 mm Diameter Scale. Can be pivoted for clear, easy reading from any angle. Long Spiral Inflation Tube (3 m). For increased working distance. High Quality Indicator. Precisely-calibrated and durable. Precision Air-Release Valve. Fine and precise air release. Maintenance-free, precise and durable manometer. Mercury-free. Environmentally friendly. Wall, Desk, Rail and Wheeled Stand. Adjustable height.