CNC machined 7075 aluminum valve stem with hi-flow Clik cores Clik valves deliver 1.5 times more airflow than Presta valves and no pressure loss on pump disconnect Compatible with Presta and Clik pump heads Includes 2 valves with Clik cores, 2 carbon wheel safe rim nuts, 2 aluminum "Quick Caps" with air release aid, and 2 spare rectangular rubber rim bases for different rim bed shapes