THE DWFP12569 REQUIRES 3.7 CUBIC FEET PER MINUTE (105 LITERS PER MINUTE) OF FREE AIR TO OPERATE AT THE RATE OF 60 FASTENERS PER MINUTE AT 80 P.S.I. (5.6 KG/CM2). TAKE THE ACTUAL RATE AT WHICH THE TOOL WILL BE RUN TO DETERMINE THE AMOUNT OF AIR REQUIRED. FOR INSTANCE IF YOUR FASTENER USAGE AVERAGES 30 FASTENERS PER MINUTE YOU NEED 50 OF THE TOOL'S C.F.M. OF FREE AIR WHICH IS REQUIRED TO OPERATE THE TOOL AT 60 FASTENERS PER MINUTE. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov -