This Jones Stephens S01050 is a brass elbow to be used for fiberglass shower stalls. It features a 1/2" FIP outlet connection size and it requires a 1-1/8" hole opening through the fiberglass wall. This shower elbow helps secure the tub spout nipple as well as the shower arm to stall. Designed for long-term use, this elbow is made of solid brass that is resistant to corrosion. Please see the specification sheet for more details. Jones Stephens will continue to provide reliable products, like this S01050, that will meet your needs without costing a fortune.