About the Wiremold WSA42-4
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.