This KOHLER® wall-mount shower arm includes a diverter that makes it easy to switch the water flow between a rainhead and handshower. Kohler has everything you need to create an extraordinary showering space. Kohler® Rainhead Arm, Wall Mount, For Use with: Kohler® Rainhead and Handshower, 1/2 in NPT, Metal, Vibrant® Brushed Nickel, 18-3/16 in L x 3-1/16 in W