Necessary if you need to attach any pattress, except Single Pattresses (i.e. Double, Triple or Quadruple Pattresses. Single Pattresses are too small to be mounted over 2 gang wall boxes), to a standard 2 gang (double) wall box. Screws and instructions are included. (Complies with BS5733:1995). An adapter plate is not required if you are mounting your pattress directly onto the wall (i.e. using rawl plugs into plaster, plasterboard, masonry, wood etc.). The colour of the Adapter Plate may be black or white, depending upon which version we have in stock.