Exairs cold air guns use filtered compressed air (80-100 psig) and vortex tube technology to produce sub-zero air for industrial spot cooling. Using only compressed air, the air gun produces a stream of cold air 50f (28c) below your compressed air cold guns keep parts cooltemperature @ 80 psi. Its clean, convenient put the gun where you need it, using the magnetic base aim the cold air stream onto your work with the flexible hose go to work!. To optimize the guns cooling capability the cold airflow & the temperature drop are factory set & is non-adjustable.for details please visit www.vivekengineers.net