Von Duprin 22ALK Alarm Kit for 22 Series 4ft. Exit DeviceThe Von Duprin Alarm Kit for 22 Series 4ft. Exit Device is a commercial alarm exit kit with function: Alarm Exit Kit, material: Metal. Shared product specifications apply across available finish or configuration variants where applicable. Alarm Kit for 22 Series 4ft. Exit Device Brand: Von Duprin Product Type: Alarm Exit Kit Function: Alarm Exit Kit Configuration: Kit Material: Metal Width: 3 to 4 Approved for Commercial Use: Yes Model SKU: 22ALK