Most appropriate for heavy heating requirements of commercial cooking and industries: General & Pharmaceuticals and Dairy. Produces lovely Blue Sunflower Shaped Flame; available in two capacities.These Burners are recommended to be used at a pressure of 320 gmcm2 (4.5 psig), however this may be varied by 25%; the heat output being varied accordingly.These Burners are also known as M-22 or M-1 and M-35 or M-2 . Also available in model M50, M78.