The side bricks line the left and right interior walls of the Hi-Flame Graphite Inset firebox, protecting the stove body from direct flame and helping to maintain a high firebox temperature for efficient combustion. Cracked or broken side bricks expose the metal behind them to heat stress and should be replaced as soon as damage is noticed. This set includes both the left and right bricks together. ✅ Compatible with: Hi-Flame Graphite Inset (Boiler and Non-Boiler versions) 🔧 Specifications Material: Vermiculite Heat resistance: 1200°C Part type: Side fire bricks (pair, left and right) Vermiculite side bricks are the correct replacement material for this stove and match the original dimensions. The pair is supplied together so both sides are renewed at the same time, preventing an uneven firebox interior.