Sorry, you're right tiggerinva. The 12x6 is a typo, 10x6 is what I was told is good for my EVO TPS .46 to replace the 3 blade prop. I was told 9x6 3 blade, add an inch to start with for a 2 blade. So 10x6 is what I'm using on my TPS .46.. I said 12x6 cuz that's what's going on my Ultra Stick with Irvine .53 and I had just bought 2 of them. Not a good prop for a non-tail dragging trainer. I edited out the typo from the above message also. - Joe