Outlet Boxes,Cvrs & Bar Hgrs | Non-Metallic Outlet Box | Fast and Easy to Install - No More Set Back Boxes | Holding Prong to Hold Box, Locking Tab to Hold Bar in Position, Stud Spacing 16 in and 24 In, Load Capacity 50 Lb at 16 In, 21 Lb at 24 In, Weight 4Southern Tier Electric Supply