Shoreline Spas SL863L-17-L1 Sterling Marble Spa with Black Skirting, Circulation Pump and LED Jets - This spa is built for style, stress reduction, and therapeutic benefits. You won't have to play "musical chairs" to gain the utmost comfort from the generous number of therapy jets. These jets are all connected by the Shoreline Spas plumbing system, which provides maximum water flow through the use of extra large hoses and tubing. Sure-grip fittings ensure a secure bond between the pipes and jets. Diverter controls allow the user to adjust the amount of water pressure to each seat.