Dayton 3Gre4 Propeller, 18 In, 3/4 Bore, 3410 Cfm
18 in, Bore Dia. 3/4 in, Number of Blades 4, Pitch (Deg.). 23 Degrees, Blade Material Spark Resistant Cast Aluminum, Keyway (In.). RPM 1725 RPM, CFM @ 0.000-In. SP 3410 cfm, CFM @ 0.125-In. SP 2920 cfm, CFM @ 0.250-In.