Whedon USP29C Deluxe Ultra 1.9 Saver Shower, Chrome Plated Brass Pressure compensating flow regulator provides steady 1.9 GPM flow rate from 30-80 psi. High velocity aerating shower. Great rinsing force, even in low pressure. Made in the USA of solid brass, chrome plated. 1-1/4-Inch diameter nozzle, standard 1/2-Inch female connection.Installs easily on any standard shower arm. Complies with federal codes. 1.25 inch diameter nozzle/ standard 1/2inch female thread It swivels; Made by Whedon 1.9 GPM flow - 30 to 80 PSI Made in the USA Easy to install