The versatile Big B 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 B inflatable vinyl fenders feature seamless construction, with molded ribs to minimize roll. Made from the highest quality marine grade vinyl with a high gloss finish. Air pressure can be regulated with the patented Trivalve, which allows custom inflation with almost every type of air pump.