A Hibiki Rain Chain has 19 round shaped cups that are made of 100% pure copper. Rain chains, called "kusari doi" in Japanese basically function like a gutter downspout. The Hibiki round shaped cups are connected with diamond shaped links. The elegant look of the smooth round design is an appealing addition to your home or patio. The wide mouth of the cup will capture the rainwater and drain down the links from cup to cup. Simply insert the triangular hanger that is included into your existing rain gutter drain hole or place it on a corner eave of your home or patio. It will weather to a delightful verdigris patina with time. Complete the look with copper or granite basin for a beautiful display.