Use this handy kit to measure natural gas or LP gas pressure across appliance manifolds from 0-35" of water column. Test gas stoves, furnaces, dryers and other gas appliances. Economical and accurate - easier to use than a manometer. Diaphragm gauge is calibrated in inches of water column, also shows ounces per square inch. Includes fitting for quick connection to the appliance manifold Packed in high impact plastic case for protection during transit and use.