Ducati Billet Rear Shock Spring Preload Adjuster Adjustor Knob Diavel Strada Amg Hyperstrada Please note your color choice (Choose from Gold, Black, Red, or Silver) Made of Heat Treated (Billet) Aluminum [6061-T6]/Manufactured using 100% CNC Machining No Casting or Molding are involved in the Manufacturing Process Finished with Anodize Coating This item comes with: (1) Rear Shock Preload Adjuster