"Big B" inflatable vinyl fenders have tubular center for end-to-end line passage. Ribbed sides keep fenders in position and minimize roll. Built-in bi-valve allows customizing of inflation level. Recommended inflation is 2 PSI. Inflation needle for hand pump included. Extra soft, tough and shiny. Sizes available: 6x15, 8x20, 10x26, 12x34. Colors available: white, blue, black & teal. Fender Boots are also available for these Fender sizes.