Stan's Tubeless Exo-Core Valve Stem AS0240

- Revolutionary design evolved from 20-plus years of experience with tubeless systems\n- Engineered to work with existing pumps and gauges\n- Oversized bore diameter ensures maximum airflow and easy sealant refresh\n- Intuitive open/close housing design has a large grip area for precise control of airflow\n- External sealing and an all-brass core eliminates clogs\n- Tapered elliptical stopper ensures airtight seal on all rims\n- Self locking valve nut has a captured o-ring to prevent loosening \n- Tap Cap stays securely fastened and has a twist and pull design