BAPL-2340 has a description of BRASS SANDBLASTER KIT 3.5 ORIFICE 1.2mm

• INSTALLATION:
• (1). Install male pipe thread into the outlet of trigger gun. If using teflon tape as a sealant, make sure to get no tape inside the pipe, as it may clog the high pressure water nozzle
• (2). Insert the probe into bag, bucket, or pile of sand. MAKE CERTAIN THE OPPOSITE END OF THE SHORTER TUBE IS NOT COVERED BY SAND. This is a breather tube and performance will be affected dramatically if this tube is obstructed
• (3). Turn adjustment knob fully clockwise for maximum sand flow

WARNING This product can expose you to chemicals, including Lead which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.  As alarming as the proposition 65 warnings may appear, you can rest assured that the products we sell remain the same as in the past. We encourage normal hygiene and discourage placing any of our products in your mouth, as they are not intended for human consumption.