Rasmussen 20" B/N/AR Mix Alterna Ventless FireStones Double Sided - DF-AFS20-BNR showcases a warm blend of brown, natural, and adobe red tones, adding rich color and depth to both sides of your ventless fireplace. Crafted from durable ceramic-bonded refractory material, these firestones withstand high temperatures, ensuring long-lasting durability without cracking. Ideal for concealing burners, this multi-tonal set enhances rustic and transitional decor. Compatible exclusively with Rasmussen Alterna Vent-Free FireStones Burners (sold separately).