Manufacturer Name: Johnson Controls Product Number: A19BBC-2 OEM Part Number: A19BBC-2 The Johnson Controls A19BBC-2 SPDT Coiled Bulb Thermostat with Adjustable Differential is a mechanical thermostat designed for precise temperature control in heating or cooling systems. It features a remote bulb sensor connected by a capillary tube to the main unit. https://www.partshnc.com/30100f-spdt-tstat-wadj-dif