EAT-CH200XA Eaton or Cutler Hammer Generator Interlock Kit Vertical Throw Main 150 or 200 amp Panel Generator Interlock Kit Fits Cutler Hammer Vertical throw main 150 or 200 amp TOP FEED ONLY 2 1/4 inch spacing between main and branch breaker Met lab listed E113887 Kit includes, Interlock, drill bit, labeling and retaining strap for generator breaker PLEASE Verify panel type by checking second picture