Krator SA007-B Black Swingram Spool Slider (Kawasaki Ninja ZX-R Engraved-ZX6R, ZX-14, ZX9R, ZX10R, ZX12R and More (1998-2011) Attributes: High Quality Billet Aluminum Swing arm Spools/Sliders(Left & Right Sides)These swing arm spools are designed to protect your swing arm & axle nut in the event of a crash Easy installation no additional hardware required Manufactured in China