Gira E2 cover frame for flat installation grey matt 3-gang Features: Shatter-proof. With the aid of the Gira device box, the Gira E2 design line can be installed flat on the wall. This device box can be recessed directly in the wall in cases of cavity mounting, e.g. a flexible wall system. For flush-mounted installation in masonry, the device box is inserted into an flush-mounted installation box, which is then placed in the wall.