Cover: front: 0.6mm, back: 0.5mm With 20-minute timer Continuous control of gas and water Applied water pressure (Mpa): 0.01 ?0.1 Mpa or ZERO PRESSURE (optional) With Cold & Hot Switch With Summer & Winter convert Switch With temperature display (optional) With ODS(optional) With Water drainage for antifreeze Water pressure and water temperature protection Safety device for accidental flameout Gas type: NG, LPG Capacity available for 6L, 7L, 8L , 10L and 12L