Air Systems ASI-2900 Venturi Style Pneumatic Air Blower Overall length 44.00" Diameter of housing 13.00" Diameter of base 11.16" Bolt circle diameter 10.28" Base slot 0.43" Intake valve connection 1" NPT Total air flow 2770 cubic feet per minute (cfm) at 50 pound force per square inch gauge (psig), 3340 cfm at 70 psig, 3752 at 90 psig Air consumed 76 cfm at 50 psig, 99 cfm at 70 psig, 127 cfm at 90 psig Weight 22.1 lb.