An example of a product classified according its material composition is a picture frame. Picture frames made of wood are classified under subheading 4414.00, which provides for "Wooden frames for paintings, photographs, mirrors or similar objects". Picture frames made of plastic are classified under subheading 3924.90, which provides for "Tableware, kitchenware, other household articles and hygienic or toilet articles, of plastics. Other". Picture frames made of glass are classified under subheading 7020.00, which provides for "Other articles of glass". And so on.