Don't waste your money on this one - sadly the accuracy of the construction is not good enough to be useful. The aluminum mounting hubs are drilled off-centre, so they are out of balance before you even get a prop mounted. There's no real chance of improving the balance of a propeller if the hubs themselves are off-centre. Also, the tips of the hubs don't fit into a 5mm hole, so you can't use these with the majority of 4 and 5 props.
F04670