Controls are mounted on the back plate and then the Back Plate is screwed down inside the 
enclosure. The back plate dimensions are 7" wide by 8-3/4" Long. 2 B/W Relays can fit but it is a little tight. The enclosure dimensions are 9-7/8" W x 11-3/4"L.

Controls are mounted on the back plate and then the Back Plate is screwed down inside the 
enclosure. The back plate dimensions are 9" wide by 10-1/2" Long.  The enclosure dimensions are 11-7/8" W x 13-3/4"L.