Zipp Speed Weaponry valve extenders for use with threaded, non-removable presta value tubes.

• Zipp 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