This special stopper offers a not expensive but sophisticated solution to rise your own flute to a higher level. Some of the various materials gives mellow sound, which rich in quality, sounds with definite core. Other materials adds airy, ethereal quality for your flute sound. All of this stoppers gives an quicker attack and easier articulation on the three octaves. I was very satiesfied with this corks on A.R.Hammig (silver) flute!
