This 24 in. ceiling mounted shower extension arm is made of 304 stainless steel with a sleek black surface finish, offering strong performance against high temperatures, abrasion and corrosion to fit long term use in humid bathroom environments. It is designed to adjust the position of your ceiling shower head to a more comfortable height, perfectly solving the common issue that shower heads sit too high under extra tall ceilings, bringing the water flow closer to your body for a more pleasant shower experience. The included matching flange has a built in rubber ring, which not only makes the connection between the arm and ceiling more stable and firm, but also avoids unwanted scratches on the ceiling surface during installation and daily use. It follows standard American 1/2 in. NPT thread for ceiling connection and G1/2 external thread for shower head connection, no extra tools are required for the whole installation process, it fits most standard shower plumbing systems for easy setup.