The versatile Big BTM fender incorporates a Center Rope Tube that allows end-to-end line passage. It can be hung vertically or horizontally with a single line. Horizontal hanging is useful protection against pilings, awkward docking situations, and tidal change areas. Big BTM inflatable vinyl fenders feature seamless construction, with molded ribs to minimize roll. Big B's are made from the highest quality marine grade vinyl with a high gloss finish. Available in four sizes to fit a full range of boat sizes.