Necessary if you need to attach any pattress (i.e. Single, Double, Triple or Quadruple Pattress, except 90mm Round Oak Pattresses as these are too small to be mounted over wall boxes) to a standard 1 gang (single) 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.