Nowhere in the world can not get this price.no matching propeller blades available ! :( was hoping to mix 'n' match with a previous purchase that lacked the prop shirt adapter size i needed, but no such luck - nice quality anyway, my mistakeKuel pre mj vetro specter z HK.Pekne spracovanI use this spinner on a Passer-X electric glider. It spins true and was just a little off balance. The blade mounting bolts on my spinner is 2.3mm in diameter and the gap for holding the blades are 6.3mm so it will be ok for propeller blades with 6mm base. The flange on the spinner back plate that compresses the collar has an 11mm outer diameter. If you are mounting the spinner very close to the motor you have to make sure that there is at least 11mm between the motor mounting screws. I drilled and tapped the blade holders to accommodate 3mm screws because my blades have 3mm holes at the base. All in all an ok product.