Aerostar Electric Series Wood Propeller 18X8 - how to fit on a 10mm axel?

hi, I cant find anything on Hobbyking that would make the Aerostar Electric Series Wood Propeller 18X8 with at 15mm diam size whole fit my 10mm motor axel. I know some props comes with spacer of some kind. Does Hobbyking deliver this with the prop or has it inn its innventory to select from?