Compatibility: Standard 1/2" NPT fittings - female and male, compatible with most common shower arms in North America. Functions: The 90 degree shower elbow changes the angle of the arm without restricting water flow or pressure. It can be rotated after installation for improved usability. This shower head connector fits most standard shower fittings, including shower arms, shower heads, shower bases, and hoses, and is suitable for use in homes, bathrooms, kitchens, RVs, and more. Durable Material: Constructed from heavy solid brass, this shower head extension offers superior performance with high heat resistance, corrosion resistance, and pressure resistance. It is more durable and stronger than ordinary brass and plastic tubing, providing a long-lasting, leak-free solution. Reliable and rust-proof: Designed as a single-piece construction to minimize leaks and damage, this shower elbow resists rust and corrosion and requires minimal maintenance. Easy to use: The shower arm extension features a rotating collar that can be easily tightened by hand, even with wet or slippery hands, without the need for tools.