Stan's Tubeless Exo-Core Valve Stems - Alloy Medium Black Pair Weight-59 The flexible and stretchy polymer

The flexible and stretchy polymer easily stretches to fit over your existing saddle adding comfort without the hassle of changing your seat

Performs well in all conditions

Features an oversized syringe body with easy-to-read gauge for precise application of sealant

welded zippers

Stan's Tubeless Exo-Core Valve Stems - Alloy Medium Black Pair Weight-59 The flexible and stretchy polymerRevolutionary design evolved from 20 plus years of experience with tubeless systems Engineered to work with existing pumps and gauges Oversized bore diameter ensures maximum airflow and easy sealant refresh Intuitive open close housing design has a large grip area for precise control of airflow External sealing and an all brass core eliminates clogs Tapered elliptical stopper ensures air tight seal on all rims Self locking valve nut has a captured o