Rohl U.5399APC Perrin and Rowe 3/4-Inch Female by 1/2-Inch Male Adaptor, Polished Chrome Type: 3/4-Inch female x 1/2-Inch male To connect hose to outlet of tub/shower mixers or exposed thermostatic mixer Allows the use of a rigid riser with the exposed tub fillers Perrin and Rowe collection 3/4-Inch M x 3/4-Inch F Adaptor