8MM Motorcycle Swingarm Sliders Spools CNC Swing Arm Fit For Kawasaki ZX1000 Ninja ZX-10R 2011-2012 Brand-new Swingarm Sliders Spools 6061 Aluminum alloy after CNC Machined + Anodizing Steel bolts(Strong and durable) Easy to install, No Installation Instruction These swingarm spools are designed to protect your swingarm & axle nut in the event of a crash