ITEM NAME:4X(BOLANY 1 Pair 40mm MTB Road Bike Gextender Valves Ultra-Light Aluminum WF9J2) 4X(BOLANY 1 Pair 40mm MTB Road Bike Gextender Valves Ultra-Light Aluminum WF9J2) 4X(Parameters:.Valve length: 40mm. 5 Thread the lock nut onto the valve stem. Valve material: Aluminum Alloy. 3 Insert the valve stem through the valve hole on the rim. Valve assembly. 1 Check if the valve core is well tightened.
