Anti Short Bushing | 0.68in Width X 0.59in Length | Combines a Maestro Switch With a Passive Infrared Occupancy Sensor. Detects the Heat From Occupants Moving Within an Area to Determine Whether the Space Is Occupied. Based on the Feedback From the Sensor, the Occupancy Sensing Switch Will Adjust the Load | Use Through Knockout to Connect Box to Conduit Coupling; Use With a Locknut to Connect Two Boxes Side by Side or Back to Back; Use With a Locknut to Connect Fixture Housings in Continuous Runs; Rigid Conduit Threads (Nps)Furbay Electric Supp