The ThermaSol No-Touch steamhead is purposely engineered to be compact, refined, and fully compatible with all PRO III Series generators. Headlined by ThermaSol's patentedNoTouch(TM) retractable technology, the steamhead protrudes to create a 360 degrees steam dispersion for a consistent temperature and output. Use the built-in aromatherapy oil well to add a spa-like element to your steam shower, with whisper quiet operation keeping your wellness space serene. Choose from different styles to suit your steam shower, with the steamhead housing kit required for proper installation. PatentedNoTouch(TM) retractable design for a flush appearance. Round dimensions: 3.5" Diameter (8.9 cm) x 1.7"D (4.3 cm) Square dimensions: 3.75"W (9.5 cm) x 1.7"D (4.3 cm) x 3.75"H (9.5 cm) Designed, engineered and built in the U.S.A. Aromatherapy:Internal Reservoir Operation:Thermal Operated Retractable Outlet