From Weller this is the Pyropen Junior, a refillable gas-powered soldering iron a unique professional, cordless, versatile piece of soldering equipment. Excellent for use when working in the field as this mini soldering iron is lightweight, compact soldering iron and ready to use within 30 seconds. The WSTA2 Pyropen fills with butane gas and we recommend using only the Weller PGR1 butane gas refill, stock number 2161668. When closed the Pyropen soldering iron looks like a standard pen, the top protects the solder tip when not in use and the base of the pen holds the reservoir of butane gas. You will need to use an external ignition source (match or lighter) to ignite the soldering iron. Replacement hot air soldering nozzles and solder tips are available and the Pyropen Junior is a great addition to any soldering kit.

Tapered Needle Tip and Hot Air Nozzle.

Gas - Weller