Outlet Box, Pre-Galvanized, Silver, 42 Cu.In Capacity, Square, Knockout Cable Entry, 1 In (Side);3/4 In (Side);1 In (End);3/4 In (End);1/2 In (Bottom);3/4 In (Bottom);1 In (Bottom) Knockout Size, 16 Knockouts, Wall or Ceiling Mount, 1 Outlet, 4-11/16 In Length, 4-11/16 In Width, 2-1/8 Height, 112.5 LB/100