Square D Meter Centres provide a compact and versatile metering and distribution centre for today's residential, commercial, and industrial markets. This mounting rail is a Square D Meter Centre meter stack accessory. The mounting rail features "hook and hang" positioning on a separate mounting channel when installing multiple meter racks. The mounting channel is secured to the wall, then devices are hung on the channel. Each mounting rail is 50.75 inches long and can accommodate up to three meter stacks.