Welcome to beyenng.id ! Details: *Colorful tube PRESTA valve extender for bicycle. *Tube tubular PRESTA valve extension,to be placed between valve stem and valve core. *Easy to install,high quality,and durable. *Best replacement for the worn PRESTA valve extender. *Made of high quality Aluminium Alloy,long lasting. *Five Colors available:Black,Red,Gold,Silver,Blue *Two length for you to choose:40mm, 50mm Package contents: 1*PRESTA valve extender