Not required., DBB Surface mount back box, white., MWS3A-DBB MWS3A Surface mount back box BESA fixing, white., DBB-EXT Surface mount back box extender BESA fixing, white., MWS3A-DBB-EXT MWS3A Surface mount back box extender BESA fixing, white., EBDHS-DBB-WBRKT EBDHS Wall mount bracket, white., MWS3A-DBB-WBRKT MWS3A Wall mount bracket, white., EBD-ENCIP1 IP65 detector enclosure, grey., EXD-HSC Extended wiring compartment for use with flush mounted detectors, white., EBDSPIR-MS Adhesive masking shields (pack of 10), white., EBDHS-MS Masking shields., MWS3A-VPPC Wall mount protective cover for use with wall mount bracket, clear.