Slide-in dividers separate the box for power and communication services. Adjustable mounting brackets offer flexibility to flush mount box in 1/2, 5/8, 1, and 1 1/4 (12.7mm, 15.9mm, 25mm, and 32mm) wall thicknesses. Ordering Data: 9 3/16 L x 5 W x 3 1/4 D (233mm L x 127mm W x 83mm D), 4-Gang, 1/2, 3/4, 1, and 1 1/2 trade size KOs. NOTE: Certified to Canadian Safety Standards, for sale in Canada. When ordering, add C suffix to part number to denote the Canadian version, i.e., WSA42-4C.