The Naish Surelock High Flow Inflate / Deflate Valve for 2020 and Newer Naish Kites and Wings.
The "Bladder Patch Install Kit" option is for when your old screw valve has to be cut out of the bladder leaving a hole in the bladder larger than the patch size of the screw valve. The Bladder Patch Install Kit includes a 6x6-inch (15.24 x 15.24cm) adhesive patch and 5x6-inch bladder protection sheet. Use the bladder protection sheet and large patch to patch the large hole cut in the bladder, and then install the screw valve on top of the patch. If your old valve peels off of the bladder easily, you do NOT need the bladder patch install kit.