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Up for sale is a New Johnson Controls 38Y156 pneumatic thermostat controller.This single-temperature pneumatic room thermostat controls pneumatic valves and damper actuators in HVAC applications, while placing minimal demand on heating and cooling apparatus, to help save you energy costs and wear and tear. Please feel free to email me with any questions. I only accept paypal and ship in the U.S. Thanks for looking and happy offerding.