Compatibility: Standard 1/2 inch NPT fittings - female and male, compatible with most common shower arms in North America. Functions: The 90 degree shower elbow allows adjustment of the arm angle 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, and RVs. Durable Material: Constructed from 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 standard brass or 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 adapter resists rust and corrosion and requires minimal maintenance. Easy to use: The shower arm extension can be easily operated even with wet or slippery hands. Simply tighten the rotating collar by hand—no wrench required.