The Nihilo Concepts Case Saver is made from 6061 billet aluminum for strength and durability. It bolts right on using the factory bolts and fits tight against the chain and sprocket thus eliminating the trapping of dirt and debris that you get with the stock plastic piece found on many bikes. Don't let your cases get broken when your chain breaks, causing hundreds of dollars worth of damage. The Nihilo Concepts Case saver is legal in the Stock class in all AMA and NMA events and is a must have for the serious racer. Made from 6061 billet aluminum for strength and durability. Mounts with stock hardware. Gives you that factory look. Note: Actual anodized color may vary from image. Detailed Specifications: The stock cover does not provide the case saving ability of the Nihilo unit. Note: ONLY compatible with Nihilo Cover (sold separately).