EAT-CH200A Cutler Hammer Generator Interlock Kit CH SERIES ONLY 150 or 200 amp panels Interlock Kit for Cutler Hammer CH series ONLY 150 or 200 amp panels 1 1/2 spacing between main and branch breakers Met lab listed E113887 Kit includes Interlock, labeling, drill bit and generator breaker retainer strap PLEASE Verify panel type by checking second picture