Anemometer and manometer gauge with Pitot tube measures air velocity in fpm, and static and differential pressure in inches of w.c. Leveling adjustment screw and built-in ground glass spirit level for accurate readings Precision machined from solid acrylic to maintain calibration, resist breakage, and provide a clear view of the scale Dual-scale has red markings for velocity readings and black markings for pressure readings with red gauge fluid for distinct readings Kit includes an anemometer and manometer gauge, an 18" Pitot tube, two lengths of rubber tubing with metal terminals, a magnetic mounting clip, a bottle of gauge fluid, an air velocity slide rule calculator, a steel carrying case, and instructions