These rugged polyethylene aqua blok tubs are made to stay flexible down to 50°F below zero and last through the harshest winter conditions. The blocks come with a secure snap lock cover and are U.V. treated to last for years. Unique nesting design allows for easy storage during the swimming season. Each aqua blok measures 3 feet in length x 8 inches in width x 4 inch in diameter. A great alternative to the popular winter water tubes and normally a better solution for sever winter cold conditions. Simply fill aqua bloks and secure over winter pool cover on your pool deck for the winter. Backed by a 5 year manufacturer warranty. Available in single, 6 packs, or 12 packs from the drop down menu below.