The JBC GSF04D guide kit is used for guiding 0.4mm solder wire into a SF280-A handle, which is part of the JBC SF-210VB automatic solder feeder.
By default, the SF-210VB automatic solder feeder is only compatible with 0.5 - 1.0mm solder wire. This guide kit makes it also compatible with 0.38- 0.4 mm solder wire.
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