YELLOW JACKET Digital Manometer: -19.5 in wc to 19.5 in wc, LCD, 1/8 in NPT - 45JT41|78052 - Grainger
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Manometer, Professional Air Pressure Meter, Dual-Port Manometer Gas Pressure Tester,12 Selectable Units Differential Pressure Gauge, HVAC Digital Manometer, Gas Pressure Tester: Amazon.com: Industrial & Scientific
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