Comes with matching square wall union for shower hose installation. This item mounts on the wall and allows the shower hose to easily connect.Solid brass construction coated with a Polished Chrome finishSleek modern design.This unit does not include the valves needed to direct water into the showerhead, a mixer or shower valves must be purchased separately. For those interested in incorporating an above shower head and/or tub filler, a mixer that includes a diverter unit must be purchased. For those interested in a hand held shower experience only, shower valves or a mixer must be purchased.UPC logo of authenticity etched on unitFeatures a back flow preventer check valve to ensure that water can not flow back into the plumbing through the shower head.