The latest 2019 DUOTONE / ELEVEIGHT MAX-FLOW one pump valve, 90 degs. elbow (Strut) version, with increased flow diameter, on mega base. All Dr.Tuba kite valves are available on two different adhesive base sizes - standard 78mm and Mega base of diameter 120mm. Dr. Tuba also moved from Tear-Aid to new Ultra adhesive patch material. This ensures permanent bond on different bladders from all brands and additional re-positioning the patch in early, crucial stages of installation. This is the best option for replacing faulty original valves on bladders from all mayor brands. All valves are HF welded on the patch and not glued, which delivers the best possible and equal bond of the valves.