Rasmussen 20" Brown Alterna Ventless FireStones Double Sided - DF-AFS20-BR offers a warm, earthy tone for your ventless fireplace, enhancing it from both sides with a natural look. Crafted from durable ceramic-bonded refractory material, this firestone set is heat-resistant, ensuring lasting quality without cracking. Ideal for concealing burners, this brown-toned set complements rustic and transitional spaces beautifully. Compatible exclusively with Rasmussen Alterna Vent-Free FireStones Burners (sold separately).