The Models CAB2-BD/-RD and CAB3-BD/-RD Enclosure Doors from Siemens Industry, Inc., are used with the CAB2-BB/-RB and CAB3-BB/-RB Enclosure Backboxes. Two doors, an outer and an inner, are required for each enclosure. The CAB2-BD and CAB3-BD outer and inner doors are black; the CAB2-RD and CAB3-RD outer doors are red and inner doors are black.