The Baby Gabriel Back Fire Brick provides the internal lining for the firebox of your Hi-Flame Olymberyl Baby Gabriel (HF217), protecting the steel walls from direct flame and retaining radiant heat where it is needed. Fire bricks are a consumable part that will eventually crack or crumble with use. This is a genuine replacement spare, made to fit the Olymberyl Baby Gabriel and straightforward to swap out when the originals are past their best.