The milKit tubeless booster can be used with any Presta tubeless valve. The milKit valves have the advantage (besides being able to measure and refill your sealant without releasing the air from your tire) of keeping air in the tire without the valve core in the valve stem – which makes inflating easier and more efficient. Presta valves with external threads that do not reach to the top of the valve stem reduce the efficiency of the milKit booster.