- "Outdoor Garden XL Gas Fire Pit Table Heater with Lava Rocks & Cover" - Description: "The Teamson Home rectangle concrete 'wood' effect gas heater with lava rocks is a must for entertaining in your patio/garden area and is sure to provide you and all of your guests with warmth in an outdoor space. The concrete rectangle gas firepit is durable for the outdoors and compliments the natural look and feel of any garden.