Magiboards Fire Retardant Blue Felt Noticeboard Aluminium Frame 900x600mm These brand new MagiSafe FRB Flame Retardant Notice Boards have been fire tested in the UK and are fire rated to BS EN13501 Class B (previously Class O) preventing the spread of flames during a potential fire. The MagiSafe FRB Flame Retardant Notice Boards has no fabric cover and is 100% coloured throughout the board, made from 100% recycled material.