Sapim Double Square Nipples. Features: Allows for truing and tensioning of wheel using internal or external wrenches Polyax design features a round shape of the head that works like a ball joint between the rim and nipple ensuring a better spoke/nipple line Aluminum SL: 7075-T6 aluminum, special coating on thread and nipple surface to further reduce corrosion and reduce friction between spoke/nipple and nipple/rim. Secure Lock prevents nipples from loosening via a mechanical means instead of a thread locking compound or paste Brass: nickel coated to ensure good corrosion resistance Specs: Material: aluminum SL Gauge: 14g Length: 16mm Color: orange Package: 100/count