- Schwalbe's Valve Extensions are made from aluminium and ideal for extending the length of your high pressure Presta valve by 17mm if it has a removable core. Coming as a pair, you will also find the valve key included in this pack. **Features:** * Material: Aluminium * Length: 30mm | 65mm * Valve Tyre: Presta * Threadless * Easy to fit * Contents: Two valve extensions and one valve key
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