Description These wooden backing boards are used to attach fire extinguisher with mounting brackets against the wall. Backing Boards Sizes BACBOA001: Backing Board 450mm (Budget) BACBOA002: Backing Board 600mm (Budget) BACBOA003: Backing Board 800mm (Budget) BACBOA004: 9kg Backing Board (Saligna) BACBOA005: 4.5kg Backing Board (Saligna) BACBOA007: Backing Board 450mm (Pine) BACBOA008: Backing Board 600mm (Pine) BACBOA009: Backing Board 800mm (Pine)