Lifeline presta removable valve core pack of 4the lifeline presta removable valve cores are a very useful spare to carry with you in your saddlebag compatible with any presta valve inner tube that has a removable core they come with a removalinstallation tool to help you swap out your bent or gummed up presta valve core features pack of 4 presta valve cores removalinstallation tool included compatible with presta valves onlybuylifeline componentsfrom chain reaction cycles the worlds l