For the integrated track crossbar on the Hobie 16! Standard equipment as of late 2005. This jib traveler is constructed of Zytel. Zytel is made of glass reinforced nylon which results in a very strong material. This resists fatigue and impact failure. Brass traveler bearings for easier movement under load. Includes holes for anchoring traveler and traveler return lines. See H16 parts diagrams for replacement parts. Port.