Polyform U.S. HTM-1 Fender 6.3in x 15.5in - Blue w/Adapter. Vertical ribs for extra protection reinforced tube ends to prevent lines from pulling through if the fender gets caught in a tight spot and extra wall thickness to resist punctures and tears are just a few of the features of this high-quality fender has to offer.The HTM Series fender is designed to provide protection and stand-off for larger vessels between 20 to 50 feet in length. Specifications for Polyform U.S. HTM-1 Fender 6.3in x 15.5in: Manufacturer: Polyform U.S. Length: 15.5 in Height: 6.3 in Package Contents: Polyform U.S. HTM-1 Fender 6.3in x 15.5in Polyform U.S. HTM-1-BLUE: HTM-1 Fender 6.3in x 15.5in - Blue w/Adapter