Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si [Compatibility]: Generator Interlock Kit for or for 150 amp or 200 amp Panels. [Safety Generator Interlock Kit]: Generator Interlock kit prevents utility and generator power from being on at the same time by sliding the locking plate up and down to avoid possible inconvenience in the event of a power outage. It brings generator power into your home to provide safe power to all household appliances. [Excellent Material]: Our Generator Interlock kit is made of high quality alloy material with good resistance to corrosion breakage, heat insulation and electrical insulation. In order to prevent accidents, it is recommended to have professional installation. [Required Spacing]: 7/8-1 1/4 Inch Spacing between main and generator breaker. Colour:As Shown Material:Aluminum alloy Package Contents: 1 * Generator Interlock kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.