Not your usual propeller store! King Propuslion is staffed by a PhD Naval Architect who specializes in cavitation. Add that to product portfolio of all types of sailboat propellers and you know you are in for a treat. The no BS aproach to technical talk gives you honest and accurate answers not a sales pitch. THe end result is impartiality on a custom propeller solution right for you and for your sailboat. How refreshing!! Check out our new website to find more about us! We offer Autoprop and Varifold sailboat propellers as well as SigmaDrive shaft couplings.