Milton S-168VEN KWIK-CHANGE Blow Gun Venturi Tip This 1/8 in NPS Venturi Blow Gun Tip is part of the KWIK-CHANGE universal tip system kit and the perfect air tool accessory to use if you're looking to give your Milton blow gun a boost in additional airflow. The side of this tip has additional holes on each side, which are designed using the Venturi effect, drawing in outside air to multiply the cfm output of your compressed air and increase airflow.