Advanced structure: made of sturdy stainless steel,with a long-lasting matte black surface,resistant to corrosion and discoloration,to ensure the long-lasting performance of your bathroom Universal : The inlet end adopts a standard 1/2-inch NPT thread,and the outlet end adopts a standard 1/2 thread connection,which is compatible with most shower heads,extension arms and wall sockets,and is easy to integrate Optimal Length: 8-inch shower arm provides ideal extension from the wall to position your shower head at the angle and distance for a comfortable showering experience Complete installation kit: the kit includes a shower arm,a decorative cover for covering the opening of the wall,and a threaded sealing tape for watertight,leak-installation Modern Aesthetic: Sleek curved design in matte black finish adds a contemporary touch to your bathroom decor while working with 5-inch,10-inch,and other size shower heads.