Brass PVD Tub Wall Supply Line Coupler Pair, PVD Physical Vapor Deposition means that the finish will remain looking new for many years to come. Swing arms allow you to adjust center to center spreads from 2 1/4 inches to 11 inches center to center. Includes coupler pair, rubber gasket, washer and 2 inch flange. Male thread to supply is a standard 1/2 in. Male thread to faucet is a standard 3/4 in. NOTE: For inside tub wall installation ONLY.