This is a 1612 ALCOA Axel End Hub Cover for 16 inch Chevrolet dually rims. It is a front mount hub cover and is for use on 16x6 and 16x7 aluminum wheels with a 8x6.50 bolt pattern. It is made in America out of high polished aluminum and includes a rubber o-ring along with an ALCOA medallion. The 1612 is 4.75 inches tall and works on 4.88 inch hub bores. Alcoa Wheels is an American company that produces and processes aluminum products worldwide. They are pioneers and creators of products as common today as aluminum foil and are present in several industries such as aviation and heavy transport. Alcoa Wheels designed the first forged aluminum truck wheel in 1948 and Alcoa represents more than 120 years of experience in the production of aluminum along with more than 60 years in forged aluminum truck wheels and accessories. Their automated production lines guarantee quality standards that meet the most demanding demands of heavy transport. Rest assured that Alcoa products will keep you running down the road.