Rectangle Flat Pan and Flat H-Burner Fire Pit Inserts Features: Commercial-grade fire pit insert features an economical flat design for recessed installation. Built from durable #304, 18-gauge stainless steel. It includes a raised hub for water mitigation, welded gas fittings for strength, weep holes for drainage. Standard 36" flex line when applicable. Installation requires 2" bottom clearance, 36"- 48" clearance to combustibles, ventilation on at least two sides, and at least 50% free air space. Spec Sheet Push-Button Ignition Flat H-burner Insert Spec Sheet