Mounting Type: Horizontal Mount Switch Type: SPST Depth: 1.5" Height: 3.88" Temperature: 130°F to 240°F The Resideo L4081A1023 Multi-Function Aquastat Controller is an essential device that is used in the regulation of temperature in different HVAC systems. This controller is mainly used to control and to set high and low-temperature. https://www.partshnc.com/l4081a1023-resideo-dual-aquastat-horizontal-mount