EAT-BR200A Cutler Hammer or Challenger Generator Interlock Kit BR SERIES ONLY 150 or 200 amp panels Interlock Kit for Cutler Hammer and Challenger Panels BR Series ONLY 150 or 200 amp panels 1 1/4 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