1. This burner features three stop cocks for Air, Gas and Oxygen with three nozzles and is designed to aim a large pointed hot flame. With almost near perfect accuracy, this Universal Blast Burner is a perfect accessory for Laboratory Glass work. Three separate nozzles allow you to adjust the size of flame produced. It is fitted on a heavy metal base with a ball joint to adjust the flame easily for working on large pieces of hard glass. Comes with a 2 meter flexible rubber pipe