Dolphin Spas are manufactures using Quarite Plus™ in 4 colors: Caribbean Blue, Blue Grass, Sahara and Dark Twilight. Digital Electronics controls are standard on all Dolphins together with GFCI protection. Each spa is plimed ozone ready - plug in the ozonator and attached the air line. The skirting is clear imported mahogany on a structural frame with all pressure treated wood on the ground. All spas have thermal pane insulation. A Spa light with colored lenses are standard with all Dolphin spas.