Easily and mess-free install and maintain tubeless tires - without clogged valves. Do you want to work worry-free with tubeless systems and sealant? The revolutionary milKit tubeless valve system makes maintaining tubeless tires quick, easy, and clean: measure and refill old sealant without releasing air from the tire; closed rubber flaps at the bottom of the valve prevent clogging from sealant. Simplified installation: the milKit valves keep air in the tire even without a screwed-in valve core, making it easier to inflate and add sealant - without the mess. This product, made in Germany, impresses with high-quality, lightweight aluminum valves and an elegant design with many smart details.