Fire Door Sequence Selector180 mm Sequence Selector for use on double Fire Doors Door coordinator is a basic requirement for all self closing pairs of fire doors that are rebated or have astragals and meeting stiles For use on double doors, pairs of Fire Doors, Double Fire Doors, rebated or non rebated double doors, where the inactive leaf is required to close before the active leaf. The Fire Door Sequence Selector is suitable for Double Fire Doors and smoke doors Door