The versatile Big B fenders have a 3/4" center rope tube for passing a line through the fender. One advantage of the rope tube feature is that a single fender or multiple fenders can be hung horizontally with a single line. In this way, one can effectively protect large areas or an entire side of the boat.Air inflation needle valve for durability and ease of use - no plugs to thread in or out or worry about dropping overboard. Recommended inflation is 2 psi. 10 Colors and 4 sizes available. Guaranteed for the life of your boatHanging fenders horizontally is particularly useful when moored against pilings where a round fender or vertically hung sausage fender would tend to roll off the piling. Other features of the Big B fenders are molded in ribs which minimize rolling against docksides or other boats, 4 sizes to suit all mooring needs, a high gloss finish, and 10 colors.Taylor Made uses only the highest quality marine grade vinyl and seamless construction for the Big B fenders which enables Taylor Made to guarantee these fenders against splitting or bursting for the life of your boat.