This is the back fire brick for the Blacksmith Artisan inset stove, made from high density vermiculite. The back brick lines the rear wall of the firebox, protecting the stove body from direct flame contact and reflecting heat forward into the room. Replace it when cracks develop that expose the stove's steel or cast iron bodywork to flame. ✅ Compatible with: Blacksmith Artisan inset stove (Non Boiler and Boiler variants) 🔧 Specifications Material: High density vermiculite Heat resistance: 1200°C Part type: Back fire brick Vermiculite fire bricks are consumable parts and will gradually crack and crumble with regular use. Minor cracking is normal, but once the brick breaks into sections or the steel wall behind becomes directly exposed, replacement is needed to prevent permanent damage to the stove body.