Saul, if you mean nylon wound over nylon, I wonder why you wish them for pedal harps? I have just a little experience using them on lever harps and after awhile the thinner, outer winding would break and “birdcage” as they say, sliding up and down the core nylon, making it all useless. As far as tone goes, on those lever harps I did not find the tone of those kind of strings outstanding. I wonder if others have had better experiences with them.