WTB MAX-FLOW PV 44mm ALLOY BLACK TCSMax Flow valves feature a castellated base that increases airflow and prevents restriction when using tire inserts 84% better airflow over standard valves greatly reduces sealant clogging potential at the valve base Integrated valvle core remover in the cap allows easy removal without the need for tools Knurled easy grip nut allows the valves to be installed and tighted without tools Integrated grommet on the nut prevents rim damage and improves seal