manufacturer part number: 2GPP-1W
This is a recessed wall box / Decora cover plate combo that accepts two decora style inserts. Perfect for mounting behind a low-profile wall mount for an LCD TV. This is an "old-work box", meaning it is made to be installed after the drywall is in place. Integrated ears secure the box to the drywall with no attachment to a stud required. The wall depth should be at least 4", and the drywall thickness should be at least 1/2". The box depth is 1.5", and is designed for low-voltage wiring.