Compatible With Siemens Or Murray Panels, Generator Interlock Kit. Product Features 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!