Velocity Series Now Available on the New Tweco Fusion MIG Guns. Tweco is excited to introduce its new Velocity MIG consumables platform. The non-threaded, “drop-in” style Velocity contact tip eliminates the need to use vice-grips, welpers or other tools to remove the tip, even if the wire burns back and fuses inside the tip. The Velocity consumables design integrates the gas diffuser into the conductor tube. This creates an improved all-copper conductor path that provides better electrical conductivity and transfers heat more efficiently away from the tip. As a result, the arc becomes more stable and predictable. Package of (2)