This micro Bunsen burner is suitable for use with natural gas (heat value 800-1200 BTU) and features a flame-stabilizing burner tip with adjustable air ports and a needle valve for gas flow control. The aluminum mixing tube is mounted on a nickel-plated die-cast zinc alloy base, with a serrated inlet arm accepting 6-8mm tubing. The burner measures 3.75 inches tall with a 3-inch base diameter. Suitable for chemistry classrooms requiring a small precision flame for delicate work.