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 easier use. 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: The solid brass construction offers high heat resistance, high corrosion resistance, and high pressure resistance, making it more durable and stronger than ordinary brass or plastic tubing. This shower head adapter is built to last for years without leaks. Reliable and rust-proof: Designed as a single-piece construction to reduce the risk of leaks and damage, this shower elbow resists rust and corrosion and requires minimal maintenance. Easy to use: The shower arm extension can be operated smoothly even with wet hands. Simply tighten the rotating collar by handno wrench required.