These spacers are machined from Billet T6 6061 Aluminum with both 5x5 and 5x4.75 bolt patterns and a center bore of 3.43" (87.1mm). Each spacer measures 1/2" (12mm) thick and has a black anodize finish.
Level 7 had these spacers machined with dual bolt patterns. These will fit the stock C10 5x5 bolt pattern or the popular 5x4.75 pattern that come with upgraded brake packages. These are used to help accommodate a larger tire, while keeping all four wheels the same size and backspace. Therefore making it possible to rotate your wheels for a longer tire life.