Polyform HTM-2 Fender 8.5" x 20.5" - Black w/Adapter [HTM-2 BLACK W/AIR ADAPTER]HTM 2 Fender 8. 5" x 20. 5" Black with Adapter In keeping with the Polyform tradition of quality, the HTM (hole through middle) boat fender was designed to provide maximum protection in a wide variety of applications. 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