Get years of enjoyment and relaxation out of this heavy duty vinyl tube built to withstand the demands of water parks and river tubing. Oversized push in compression valve makes for easy inflation and deflation. Includes patch kit. Swimline Corp. is a family owned and operated business. Founded in 1971 Swimline has grown to be the largest manufacturer of above ground swimming pool liners in the world. In addition Swimline Corp. is the largest importer of in ground and above ground swimming pool covers and related accessories.