Excellent prop even for use on High Kv electric outrunner motors. I have tested and run this prop on 2212/6 2200 Kv motors and it produces more thrust at a lower amp draw than the 6x4 APC electric props I was using on a 3S battery. Also on a 2212/5 2700 Kv motor, the thrust increase over the 6x4 APC electric was 5 oz and the amps actually dropped from 35 to 32 :) Great product and I will purchase more in the future. Also a shout out to AMain, great service, prices and very good shipping rates to Canada, very pleased with the product and the service. Thanks AMain :) Cheers, Scott