Rozin Rainfall 16-inch Bathroom Shower Head Square Top Spray Black Color Rainfall Shower Head,Solid Brass Material,Black Color Size:16*16-inch(40cm),mainly used as ceiling mounted shower 1/2" Standard connection,with rubber gasket and ball joint If you need a shower arm,refer to item ASIN:B017CLI77W Rozin provides any replacement in future use,so contact unhesitatingly once you have any problem