The solution to combat sealant drying out or escaping! With other tubeless tire valve systems you need to remove the tire to check if enough sealant remains, with milKit you can simply remove the valve core and insert the syringe to check. No mess and faster results! Patented milKit presta bike valves are made in Germany from anodized high quality aluminum alloy and high performance rubber for the smart flaps. milKit valves can be used with most sealants, but we recommend milKit sealant. This has been specially designed for best results with these valves. Valves available in 35mm, 45mm, 55mm & 75mm versions.