The Miller Electric Company® 0.035" (0.9mm) standard duty contact tip for GA50A MIG guns. This threaded contact tip accommodates 0.035" (0.9mm) wire and measures 1.625" in length. In the MIG welding process, the contact tip is responsible for conveying the welding current to the wire as it passes through the conductor tube or bore, creating the arc. (1/pack)