This extension provides easy access to the inner dual tire found on campers, recreational vehicles, and light trucks. Fits standard valve cap threads. Comes with clamp to secure extension to wheel cut-out. 2 extensions per pack. Standard effective lengths are 7 inch and 9 inch. Effective to 200 PSI. Also available, clamp part number FE-300CL, which clamps directly to the lug nut. Other lengths available upon request. Includes steel braid over rubber hose.