Unique four-way x-cut base works with all tire inserts. Integrated spoke key cap (for standard 3.4mm spoke nipples) for trailside emergencies. Valve core remover cap makes removing the valve core to top up sealant a breeze. Made from lightweight anodised 7075 aluminium and fits most road, gravel and mtb tubeless rims including carbon. Rubber base creates an airtight seal on valve holes up to 8mm in diameter. Flat sided lock ring makes tightening the thread a breeze. Rubber o-ring to prevent the lock ring from scratching your rim. Chris King colourways. Sold as a pair.