I have not kept up with the manufacturing of props but; I do not believe that you can buy nylon props anymore. The composite props do not seem to be nylon, at least not the form that the original nylon props were. Maybe some of the manufacturers would jump in here and let us know what modern day props really consist of. Most seem to be a form of epoxy bonded material, probably mostly a fiberglass type of material. Anyone know for sure? There appears to be at least two forms of plastic for the electic users as well, probably more than two.