The akuaplus® BDG20BL shower arm and square flange set combines style and durability in a matte black finish. Made of brass, the 6-inch (15.24 cm) wall-mounted shower arm includes threaded connections and a 2-11/32 x 2-11/32 x 11/32 in (5.9 x 5.9 x 1.5 cm) square flange made of stainless steel for a modern, coordinated look.