Orbit FA-UMAB Fire Alarm 4" Square 3-1/2" Deep Box Adjustable From 0" - 1-1/2" 10 PackORBIT FA UMAB FA UMAB Product Description Orbit Fire Alarm 4" Square 3 1 2" Deep Box Adjustable From 0" 1 1 2". Specifications: Category: Steel Outlet Boxes Manufacturer: ORBIT INDUSTRIES, INC. UMI Full Technical Description: Adjustable, Universal Mount Type; 16 Gauge Welded Galvanized Sheet Steel Material; 4 Inch; 4 Inch; 3 1 2 Inch; UL (Canada and Us) Approval; 10 Standard Package; 46 Cubic Inch Capacity; (4) Cko Bottom, (12) Cko Side Knockout Size;