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Zipp Valve Extender - 48mm 60/404 1 Piece Threaded Presta Valve BLK

.top{margin-bottom:30px;}.top li{margin-left:5%;margin-right:5%;margin-top:10px;line-height:120%;list-style-position:outside;} Zipp Valve Extender - 48mm for 60/404 1 Piece for Threaded Presta Valve Black. Zipp valve extenders for use with threaded non-removable presta value tubes. For use with threaded presta (non-removable core) tubes Extenders thread "over" an existing valve and do not "replace" a valve core Knurled end to keep pump from slipping 3mm hex broach in the barrel to guarantee a perfect seal when tightened Sold each