Bosshead (boss head) clamp. These come in many styles, this is the best.
Many are very thin, the paint flakes off and the shaft rusts. This bosshead has a high tech coating and a stainless shaft which will not rust under general conditions.
High quality stainless steel Bunsen burner, with needle valve for gas flow control. Also includes adjustable air intake.
150mm in height.
Easily dismantled (unscrews) for cleaning.
Tapered gas inlet nozzle will fit a wide variety of tube sizes.