Firegear FPB-34SFBS31TPSI-P TPSI SS Square Flat Liquid Propane Fire Pit Burner System w/ 34" Pan 175K BTU - This square flat fire pit burner system has a 34" pan and 31" burner, both constructed of heavy duty stainless steel. It features a thermocouple piloted system with safety valve (TPSI) that turns gas off when there is a loss of flame. An easy ignition with battery spark igniter is also included. The system is for use with liquid propane, however, natural gas to liquid propane conversion kits may be purchased separately.