Tweco Velocity2™ VTH-45 Contact Tips .045" 10/Pack - (11601763)Tweco VELOCITY2 Heavy Duty Air Cooled Contact Tips are designed for use with Heavy Duty VELOCITY2 Nozzles. All of the features of VELOCITY2 result in more convenience and higher productivity for the welder. Arc Gun Consumables Model Use with Contact Tip Wire Size 1160 1761 Heavy Duty . 035 in. 0. 9 mm 1160 1762 Heavy Duty . 040 in. 1. 0 mm 1160 1763 Heavy Duty . 045 in. 1. 2 mm 1160 1764 Heavy Duty 3 64 in. 1. 2 mm 1160 1765 Heavy Duty . 052 in. 1. 3