The Olymberyl Gabriel (HF332) Fire Bricks Full Set is the genuine replacement lining for your Hi-Flame Olymberyl Gabriel's firebox. Vermiculite bricks absorb heat, protect the steel body, and radiate warmth evenly into the room. They are a normal wear item and replacing them promptly prevents damage to the stove structure. No specialist tools required, and fitting is a job most owners can handle themselves.