Weller pyropen piezo soldering iron weller t0051605999 powered by butane gas this pyropen offers soldering iron hot air blower and blow torch options it has a short heat up time and can be refilled in seconds from a refill cylinder a sight glass shows the level of gas in the reservoir temperature control is acheived by increasing and decreasing the gas flow weller t0051605999 pyropen piezo soldering iron with gas