The Smartop Upright is a top-quality spa lid that creates a private and peaceful hot tub experience with its functional space-saving design. Feather-light opening and closing, durability, and a chic, sophisticated appearance make Smartop the perfect new or replacement hot tub cover. Available for spas measuring up to 120 inches. A minimum of 8 inches of clearance is required behind the spa and 3 inches on each side.