I make my tuned windchimes from aluminum, copper or galvanized steel pipe. I sand and grind them to create pleasing designs. Each pipe is carefully trimmed to the length that will produce a soothing tone that is long and harmonious. The tubes are arranged so that each one is struck effectively in order to produce maximum sound. The tubes are suspended from an aluminum top piece by nylon-coated stainless-steel wire. This adds to the longevity of the chime. Most commercially-made chimes are suspended by some sort of string. I have repaired quite a number of them. My handmade strikers and and sails are made from natural woods, either red oak or aspen, I coat each component with 6 applications of spar urethane in order to seal the wood against the elements. Though the windchimes weather through the years, the sound will always be pure, and you have a lifetime warranty.