Zipp Speed Weaponry Valve Extender: 48mm for 60/404, 1 Piece, for Threaded Presta Valve, BlackZipp Speed Weaponry 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 Product Specifics Today's Stock Status 8 Available to ship in 2 4 Business Days UPC: 710845779770 EAN: Not