Gemfan 65mm Bi-Blade 2.5" Prop 8 Pack (1.5mm Shaft) - Choose Your Color

These props can take some abuse. The push-on design prop is prone to flying off. If you crash a few times the props will loosen. Be sure to make sure they are all fully seated after a crash or you'll be in for a surprise on your next flight. Buy a bunch.

Excellent quality.

These props are awesome for what they are. They hard very hard to break and allow good air flow. I put them on an e-flite UMX Ultrix. Just make sure to get the 1mm ones not the 1.5 as those are too big. Very satisfied with product

Thought they'd be better

Love Gemfans and bi-blades but these are too soft. If you're looking for soft and smooth then these are for you. I went back to 2" tri-blades, got similar flight time and better performance.