This is a Carlon 3 Gang Switch and Outlet Box BH353A.
This item is made of durable blue PVC. It is non-conductive, non-corrosive, and features two captive nails for easy installation into new work that has not yet had wallboards installed. It has a 53 cu.in. capacity and is sized for standard devices with extra room for wiring or larger devices.
This is a pre-owned item in great condition with some black sharpie writing on the inside.