19402 Titan Blow Gun with Removable Venturi Tip: This blow gun features a removable slotted Venturi tip to help prevent pressure buildup (The Venturi effect helps them to draw more air and create 4 times more pressure than standard blow guns), and it can provide 90 to 120 PSI working pressure and up to 220 PSI maximum pressure and it has a 1/4 in. NPT air inlet thread.