Krator 701-0600 Black Swingram Spool Slider (Yamaha YZFR1 R1 R6S 600 1000 FZ6 YZF) Specifications: High Quality Delrin 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