Premium Material: This valve cores for tires is made of great quality brass, which is reliable, safe, dependable, practical. They prevent your old valves from leaking. Practical Tools: These valve cores provides a precise fit for Presta valve stems, the dismantle tool can easily tighten or dismantle the valve core on any tire, and valve core caps are used for covering your valve cores and prevent them from damaging. Easy to Install: Dismantle your old valve cores , and put in the one and tighten it, then check if it fits, cover your nut finally. Valve core set is suitable for various tubeless road bikes and bikes Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:Copper + aluminum alloy + plastic Package Contents: 40pieces x valve cores 8 x valve core dismantle tools 40 x plastic valve core caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.