Appleby Metal back box – Single, Double and Dual Appleby products have always been known for quality and value for money, the extensive range of switch and socket boxes, moulded and metal adaptable boxes, enclosures and luminaires provide the ideal solution for electrical installations, in any commercial or industrial environment. This square back box conforms with the BS4662 standards and is popular with electricians due to its high quality and reliability. Features: - Galvanised steel knockout box. - Available in 16mm, 25mm, 35mm and 47 - Single, Double and Dual Please note: If you require a larger quantity than listed, please get in touch and we will provide a separate quote. Require faster delivery? Then please get in touch before making the .