TB-200A Thomas and Betts, Challenger and Westinghouse Generator Interlock Kit 150 or 200 amp Panels
Brand: Geninterlock.com

Generator Interlock Kit for Thomas and Betts, Challenger, and Westinghouse 150 or 200 amp panels. 1-1 1/8 spacing between main and branch breakers. Met lab listed E113887. Panel and breaker not included

Generator Interlock Kit for Thomas and Betts, Challenger, and Westinghouse Panels
1 to 1 1/8 inch spacing between main and branch breakers
Met lab listed E113887
Includes Interlock, Drill bit, labels and generator breaker retainer
PLEASE Verify panel type by checking second picture