Steamist 3199-ORB Aromatherapy Steam Head, Oil Rubbed Bronze Dimensions: 3.0-Inch x 3.0-Inch Steamline - 3/4-Inch Copper or Brass NPT male thread Steamline should protrude 1/2-Inch from finished surface. Steamhead to be mounted 18-Inch above the finished floor or 6-Inch above the rim of the tub and as far from the seating area as possible Oil rubbed bronze