American Fire Glass Lite Stone Balls are the ideal addition to your fireplace or fire pit. Whether you are considering a more contemporary natural look or simply looking to change things up, the light weight ceramic Lite Stone Balls are designed to be accents and set on top of lava rocks in your fireplace or fire pit. Lite Stone Balls boast a modern, minimalist design to create a neat, uncluttered look for your gas fire pit or fireplace. Whether you have an outdoor gas fire pit or an indoor gas fireplace, these lite stone balls will maximize the effect of your fire feature. Hand-crafted, these Light Stone Balls get their color from an environmentally friendly ceramic stain that is absorbed into the porous fireproof material. They are also clean burning with no smoke, ash, or harmful fumes. Extremely durable, Light Stone Balls are freeze tested & fire approved to handle the harshest weather conditions. This Thunder Gray colored 18-inch set contains 11 balls and covers an 18 x 6-inch area. Also includes 5 pounds of small lava rock.