These plates are designed to cover cable entry or exit points in brickwork where satellite or coaxial cable has been passed through the wall. The cover has reinforced points for screw fixings and silicone can also be used to create a waterproof seal from the elements.
The cover is wider directly over the hole to allow cables to exit the wall without placing them under undue stress by causing the bend radius to be too small. The cover is 30mm deep and the screw centres are 79mm apart. The overall size is 102mm x 102mm.
Also known as a blow out plate, cable entry plate or cable exit plate.