The North Lazy Pump One Pump 2nd Generation valve is the original factory valve for 2013 and newer North kites with a one-pump system. This valve is also a compatible replacement for Crazyfly kites one-pump system (2015 and newer). From the leaders in kite repair technology, Fixmykite.com's Self-Stick Valves will stick on all bladders. Simply peel and stick to make a fast and easy repair on an old bladder or attach to a brand new 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. The "Valve Patch Size" option allows you to select the size of the Tear-Aid patch on the base of the valve. Standard valves have a 3-inch diameter base and the Mega patches have a 4-inch diameter base. This extra inch diameter on the Mega valve means 77% more adhesive and surface area compared to the standard valve patch size. The additional surface area provided by the Mega valve patch is necessary when the old valve is cut from the bladder or the bladder is torn or warped when the old valve is removed.