X-Sauce Presta Valve Kit:
Blister pack with 2 removable tubeless Presta valves including caps and nuts + adapter for Schrader tubeless valves + 2 flat O-rings + 2 conical seals + tool to open and close the valve. Very convenient; the valve core can be removed to inject sealant without needing to remove the tire. The valve core can also be tightened with a spoke wrench or a small flathead screwdriver.