Model CH7L Interlock Kit fits Cutler Hammer / Eaton panels with a single, centered, vertical-throw main breaker and "CH" style tan breakers and approx. 4 5/8"  from the bottom of the main breaker to the top of the generator breaker as shown.
 
The generator breaker will occupy the top two positions in the LEFT breaker column.
 
This kit is not yet a full production run kit, so it is not our signature blue anodized color. It is precision CNC machined from solid aluminum billet however, and looks very professional and fits very well. The kit includes everything necessary to complete the installation including all hardware, the correct size drill bit, name brand thread lock compound, a full warning placard set, and clear installation instructions.
 
All of our interlock kits are proudly made in the USA!