AMERICAN STANDARD THREADS: 1/2 NPT Tapered Threads fit for all standard shower head LEAK PROOF AND RUST PROTECTION: Our shower arm is made of quality stainless steel with a high polished brushed nickel,rustproof and long-lasting durability. STYLISH DESIGN: Brushed nickel surface to create a bright,highly reflective,cool grey metallic look EASY INSTALL: Includes flange and Teflon Tape. No tools required for easy installation BRAND ADVANTAGE: NearMoon has been committed to developing bathroom products for many years. Now is completed with extensive product lines,better quality products,more favorable prices..