Manometer, range 8-0-8, 9 oz water or mercury required.1211-16

Analog Manometer, Pressure Range -8 to 8 in wc, For Tubing Diameter 0.187 in, Maximum Operating Pressure 50 psi, Maximum Pressure 8 in wc, Minimum Pressure -8 in wc, Scale Units in wc, Series 1211, Manometer Type Flexible U-Tube, Housing Material Vinyl-Plastic, Includes Gas Pressure Kit No Gas Pressure Kit Included, Fluid Color Green, Includes (2) Nylon Rubber Tubing Connectors, Bottle of Fluorescein Green Color Concentrate with Wetting Agent, Magnetic Mounting Clips, Plastic Case