AZ Patio Heaters Fire Pit Fire Glass in Cobalt Blend, 10 Pounds Fire glass is very easy to maintain because it emits no ash, soot, or smoke. Thus you can spend more time enjoying your fire pit/place and less time cleaning it Our fire glass is not just exquisite to behold, it is also very practical. It does a wonderful job of covering the entire floor of a fire feature, effectively hiding the unseemly pipes and tubes Heat Rating: Higher temperature when compared to logs, lava rocks, stones, etc. Ideal for both indoor or outdoor environments, fire glass may be used in either natural gas or propane fires Available in 10 and 20 pounds