Designed for use with Natural Gas Only Burner is 4 1/2" High, has a Solid Brass Burner with a Black Base ( #08910) Also includes a flame height adjustment knob Recycling wax cup (#32310) is designed to fit perfectly over the 5U Bunsen Burner & help in the recollection and recycling of lost or excess wax No. 5U Bunsen Burner. Designed for use with Natural Gas Only. Burner is 4 1/2" High, has a Solid Brass Burner with a Black Base, and adds a Flame Height Adjustment Knob