Rasmussen 24" Light Gray Alterna Ventless FireStones Double Sided - DF-AFS24-LG brings a modern, neutral tone to your ventless fireplace, visible from both sides with its soft light gray color. Made from durable ceramic-bonded refractory material, these firestones are designed to withstand high temperatures without cracking, ensuring long-lasting beauty. Perfect for concealing burners, this light gray set complements contemporary and transitional decor. Compatible exclusively with Rasmussen Alterna Vent-Free FireStones Burners (sold separately).