I have purchased this prop for a Tangent Flamingo. Balancing and quality is perfect. Outrunner is a turningy 38mm 1500KV one. Enough power to climb in a minute to soaring heights. Also the 13x6 is of the same excellent quality
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Mine was not well balanced. The difference was almost 50 mg. But the blade is hard, strong, firm and sharp - like a knife. Good prop fot the money! (Although it have to be additionally balanced.)