Cabrinha one pump valve used on the leading edge and strut bladders of the older Cabrinha kites. Valve is 20mm high, has a 90 degree bend and fits into a hole in the edge of 10mm square.
This is the valve only. We use these in our repair centre to repair kite bladders, they don't come pre-prepared so only suit experienced repairs and other repair centres. We have made an instructional video showing a technique we developed over many years to fit these here-