Max-Flow valves feature a castellated base that increases airflow and prevents restriction when using tire inserts84% better airflow over standard valves greatly reduces sealant clogging potential at the valve baseIntegrated valvle core remover in the cap allows easy removal without the need for toolsKnurled easy grip nut allows the valves to be installed and tighted without toolsIntegrated grommet on the nut prevents rim damage and improves sealUniversal Presta valve core allows easy sourcing of replacementsTubeless Valve44mmPair11gAluminumBlack23mm - 31mmUPC/EAN/GTIN: 714401951129