This great sounding wind chime is made of all copper and brass. Its hanger and wind catcher are made of copper. Its frame, clapper and 5 tubes are all made of brass. By combining these two quality materials, this wind chime will last forever. Comparing to aluminum or bamboo tubes, the sound resulted from brass tubes is much richer. Brass and copper will also develop a beautiful patina with time and weathering. During the development of this wind chime, we tested brass tubes of different length and thickness and decided on current specifications for the rich sound and beautiful musical tone. Size: overall length 27″, length of the longest tube 15″.