High Quality the interlock kit is made of corrosion-resistant aluminum alloy, and has been treated with surface anodization, which has better heat insulation, electrical insulation, so that you can use electricity safely. Generator Interlock Kit Compatible With Siemens Or Murray 150 Or 200 Amp Panels 7 8 1 1 4 Inches Spacing Main Branch Breaker Electrical Interlocking Panel Generator Interlock Kit Siemens, Compatible With Siemens Or Murray, 150 Amp Or 200 Amp Panels, 7/8-1 1/4 Inches Spacing Between Main And Branch Breaker... Safe To Use the generator lockout kit to allow safe back feeding of your home through a portable generator during power outages, prevent utility and generator power from being turned on at the same time. ACANORA Generator Interlock Kit for Murray or Siemens 150-200 Amp Panels, 7/8 to 1 1/4 Inches Separation Between Fits both 7/8 and 1 1/4 spacing panels Generator Breaker top Right Replaces the MUR-200A Easy to install, no need extra control box or wiring. 200 Amp Breaker Panel SIE-P1 Generator Interlock Kit | Siemens And Murray 100A, 7/8" - 1-1/4" Spacing Square D Homeline International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.