The 11mm Deflate (Dump) Self-Stick-Valve is used on most kites as the deflation system.

FixMyKite.com Self-Stick-Valves will stick on any bladder material or color. Simply peel and stick to make a fast and easy repair, or attach to a newly replaced bladder. The specially formulated adhesive is incredibly durable making for a permanent repair. Everything needed for installing the new valve is included in the package: alcohol wipe and detailed instructions.