Topring 60.390 Airpro High Performance Non-Restricted Standard Blow Gun With 4 Inch 8mm Tube

If The Tip Of The Nozzle Is Blocked, A Check Valve Located Inside The Blow Gun Mechanism Immediately Shuts Off The Airflow. Thus A Worker Will Never Risk Being Exposed To Dangerous Airflow On His Skin. When The Tip Of Nozzle Is Free Of Any Obstruction, The Valve Reactivates To Release Air.