Packing list: 8Pcs valve extender Product name: Tire valve extender Material: Chrome plated copper Color: Silver Gross weight (g): 26/51 Product size: length 27mm/1.06inch, upper diameter 7.6mm/0.3inch, lower diameter 9mm/0.35inch Features: 1. The valve extension rod is fixed with threads instead of the original valve cover. You can check the air pressure or add air without removing it. 2. You can easily install the valve extender on car, truck, and motorcycle tire valves by simply screwing it onto the existing tire rod without the need for an additional dust cover.