The RP-SA1642CH shower arm fits S28CD-1642CH and S18CD-1642CH models (part #23). Made of corrosion-resistant chrome-plated brass, it provides exceptional strength and long-lasting performance. Installation is simple: remove the old arm, clean the threads, wrap plumber’s tape, and screw the new arm securely into the wall fitting. Its smooth chrome finish ensures a watertight seal and adds a sleek, modern look. Perfect for bathroom upgrades or replacements, this shower arm delivers dependable support for your shower head while enhancing the overall elegance of your space.