AllPoints 721005 Gas Pressure Test Kit, Complete With Carrying Case Tubing And Fitting 0″-35″, Accurately Set Manifold Pressure For Natural Or Lp Gas., Easier To Use Than A Monometer And More Compact Too., Attractively Priced., Special Sensitive Diaphragm Gauge Calibrated In Inches Of, Water Column., Special Tube Nipple For Easy Connection To Manifold.