Topeak Valve Extender - 28mm BPW It shields your bike against

It shields your bike against water

combining cutting-edge technology and durabilityUtilizes Bluetooth and ANT+ protocols for seamless connectivity with cycling computers and smart devicesPowered by a single AAA lithium battery with an operating time of over 400 hours for extended adventuresFeatures power measurement on the left side

Fill marks so you can easily mix up drinks to your needs

road or trail surface

while the Small fits 22

Topeak Valve Extender - 28mm BPW It shields your bike againstMachined from durable aircraft grade aluminum alloy to conveniently extend length of two piece type Presta valves by 28mm to aid inflation. Durable aluminum alloy valve tool is designed to easily tighten or remove two piece type Presta valve cores and valve extenders. Note: To improve air seal, wrap threads of valve extender and valve core with Teflon thread tape and ensure threads are tight. Specifications Size: 3. 8 x 0. 6 x 0. 6 cm 1. 5 x 0. 23 x