Are you looking for a replacement for your original faulty valve? Dr. Tuba's 11mm Deflate Valve with ultra adhesive patch material is the solution for that! This deflate valve is very reliable in terms of durability and permanent attachment adhesive bond on different bladders. This replacement valve is HF welded on the patch, it is not glued -that is why it is far more advance in strength and longevity. This replacement valve is commonly used for deflation on most kites and can be fixed on the spot, anytime and anywhere!