Review on Milton S 441 Brass Valve Extension by Justin Gore

As stated in the title. This item is very easy to use. If you don't have the valve stem long enough, this will lengthen it an additional 3/4 inch. There is also another version that is slightly longer that you can buy. You simply unscrew the valve stem cap on your old valve stem, screw this extension in, and then put the cap on the extension. There's a little "ball" in this thing that pushes the shaft when you fill air.