The Watts 0887709 is the vent float kit only

and mixed air sensing

OEM Precision: Direct replacement for Armstrong R45582-001 to ensure balance and system compatibility

5-inch rod length designed for precise placement within the burner's flame path

Miscellaneous Product TS-470 Switch Els PW 17895 The Watts 0887709 is theThe TS 470 Damper Position Switch provides open or closed position indication for compatible HVAC dampers and control assemblies. It uses an encapsulated mercury SPDT position switch mounted on a crank arm designed for a 1 2 inch horizontal damper shaft. This HVAC damper end switch changes contact state as the shaft rotates, allowing a building automation system, control panel, relay circuit, or other compatible equipment to confirm damper position.