Alcoa Aero Full-Moon Rear Axle Cover Kit with Thread-on Lug Nut Covers. Chrome. Lug nut covers for 33 mm lug nuts. Full disc wheel cover reduces aerodynamic drag and has a streamlined look. Easy to remove and replace for wheel inspection and access tire valve stem pressure checks. Designed specifically for Alcoa 22.5" X 8.25" steel wheels and aluminum wheels. Heavy duty plastic inner mounting base with easy snap-on plastic aero cover. Includes thread-on nut covers, wheel protector film, and top cover removal tool. NOTE: Requires a minimum of 6 threads or half inch of threads extending through the top of each lug nut for proper installation. Recommended nut cover installation tool #1025,9 sold separately. No warranty for damage caused by road debris, rocks, chemicals, truck washes, improper installation, etc. Large Package.