Carlon B349ADJ Outlet Box, New Work, 3 Gang, 5-13/16-Inch Length by 3-5/8-Inch Width by 3-Inch Depth, Blue The product is 3G ADJ Box Easy to use The product is manufactured in China Patented design allows for adjustment from 0 to 1-3/4-Inch after installation Ideal for new work or retrofit (old work) applications Backless low voltage bracket and floor box designs available Ideal for various drywall thicknesses and wall finishes All PVC boxes are permissible for use with 90 degree C connectors