Rozin Bathroom Square 12-inch Rain Top Spray Shower Head Oil Rubbed Bronze Rainfall Shower Head;Solid Brass Material,Black Color Shower Arm is not included,if you need one,refer to the ASIN:B017CL6ZTO or B017CLKQ8A Size:12*12-inch(30cm) 1/2" Standard connection,with rubber gasket and ball joint Rozin provides any replacement in future use,so contact unhesitatingly once you have any problem