THIS IS FOR 2 OF PUMP ADAPTER PRESTA INNOVATIONS ALUMINUM THREAD-ON STYLE (THREADED INTERIOR). A LOT OF BIKES TUBES NOW A DAY HAVE THE SKINNY VALVE CALL PRESTA VALVE. THIS ITEM IS MADE TO THREAD ONTO THE PRESTA VALVE TO TRANSFORM INTO AMERICAN / SCHRADER VALVE FOR EASY CONVENIENT WHEN YOU PUMP THE AIR INTO YOUR BIKE.
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