ST04 Backenzahn is a side table by Philipp Mainzer for e15, a structure made entirely of solid black oak.e15 celebrates 25 years of BACKENZAHN™ with a new edition of the iconic side table designed by founder Philipp Mainzer. e15 proposes Backenzahn, a matte-black finish that highlights the alchemic process that produces a natural tannic acid reaction in the oak wood when triggered with a special mixture of natural ingredients.ST04 Backenzahn is considered a design classic and has become an identifying icon for brand e15 and part of several permanent exhibitions in Museums. The four identical legs in the shape of an inverted cone form two intentional incisions on the surface of the floor forming a slightly concave seat and providing the right comfort. Thanks to her strong personality will fit easily the environments in which it is placed. This piece can also be supplied with a top floor to be used as a coffee table.