Powered Back Guards (variable length x 4" H x 2" D) are available in lengths to match the length of the work surface or shelf and come standard with Electrical Power Kit EP-1 (other EP kits are available). PBG-72 EP is 72" long providing 6 electrical outlets in EP-1 kit, PBG-60 EP is 60" long providing 5 electrical outlets in EP- 1 kit, and PBG-96 EP is 96" long providing 8 electrical outlets in 2 EP-1 kits.