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SMJ Surface Pattress Boxes can be used for installation and with electrical circuits around the home, making them ideal for a variety of applications. Single or double pattress box options available in various depths. Supplied as a trade pack. 1 x SMJ Pattress Box Single 19mm Trade Pack Specifications • Type: Surface Pattress • Depth: 19mm • No. of Gangs: 1 • Material: Plastic