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GAS TEST KIT 0-10" Sensitive diaphragm gauge calibrated in inches of water column and ounces per square inch Improved lamination strength of diaphragm (bellows) to brass plate withstands higher over-pressure Tube nipple for easy connection to system manifold Two gauge ranges available The unique single bellows on brass plate design replaces the double bellows for a stronger seal that resists greater over-pressure Made in the USA
