At Duty Cycle 0~20%: 1400 RPM At Duty Cycle 50%: 3500 RPM At Duty Cycle 100%: 7000 RPM At Duty Cycle 0~20%: 7.405 CFM At Duty Cycle 50%: 18.517 CFM At Duty Cycle 100%: 38.283 CFM Copper Base with Aluminum Stacked Fin