Federal Signal WB Weatherproof Back Box Housing Accessory, Gray 819175001060 The switches and housing are

The switches and housing are constructed of durable nylon for a long life and the terminals are made of copper alloy and/or silver plated copper alloy

Each comes tuned for its specific mounting location so no calibration is needed

Designed with an elasticized edge to ensure proper fit

After taking out two hinge pins

1-touch speed control and 9 speed options

Federal Signal WB Weatherproof Back Box Housing Accessory, Gray 819175001060 The switches and housing areBrand Federal Signal Model WB Cast aluminum neoprene gasketed weatherproof housing For outside use For use with Federal Signal 350 Vibratone Horns Cast aluminum neoprene gasketed weatherproof housing for outside use complete with mounting lugs; tapped for 1 2" 3 4" conduit; 4 3 8" square box; 2" deep mounting lugs on 4 1 2" centers.