Manufactured with tough rubber, the flexible valve extension is equipped with 2 lock nuts and 3/4 inch hex sealing nut. Cap and core not included. The effective length is measured from the rubber seal located inside the base collar of the extension to the capless tip of the extension. Flexible rubberhosingallows for multiple angles in large bore applications. From passenger to OTR, All Tire Supply has an all-inclusive line of valve extensions to suit every need where inflation length is important.