Compatible With Murray Or Siemens Panels Is The Generator Interlock Kit. Compatible models: generator breaker interlock kit Compatible with Siemens/Murray 150 or 200 amp panels. The Spacing between main and branch breaker is 7/8 to 1 1/4 inches. Before buying, you need to make sure the model and spacing are correct. Application scenario:Our kit provides a easy and safe solution when inconvenience caused by unexpected power outages. The interlock kit prevents both mains and generator power supply at the same time, it is used to safely direct generator power to any circuit in your home, while ensuring you can safely use all your household appliances. Professional and safe:We specializes in Generator Interlock Kits. We produce high-quality products to provide safety for you and your family. Electricity safety is no smal Package includes:1 interlocking panel, 1 matching drill bit, 3 shoulder screws, 3 hex nuts, 5reminder labels, 2 fixing straps, and installation and use instructions included. Worry-free after-sales:For whatever reason, you are not satisfied, you can ask for a replacement or a full refund. Our products come with a lifetime warranty, if our products fail, just send us an email and we will mail you the new original for free replacement part.