Great Deal Furniture Myrtle Outdoor 30-inch Octagonal Liquid Propane Fire Pit with Lava Rocks 30D x 30W x 24H Made of magnesium oxide & metal 40,000 BTU Assembly required. Note: Does not include liquid propane tank The Myrtle fire pit, featuring 40,000 BTU, is a wonderful addition to any patio. With its all-inclusive seating possibilities, this fire pit is sure to provide you and all of your guests with warmth for those mild summer nights.