Duotone strong middle line Kitesurfing trust bar 2015-2022 Duotone trust strong middle line Kitesurfing trust bar 2015-2022. No 5 in the diagram, is a heavy-duty line from the pulley above the bar to the Y connector. This line takes most of the load for the front lines before the line splits to the front flying lines of the duotone trust kite bar. Boardworx Youtube We stock other kitesurfing accessories here.