8mm Swingarm Spools for Honda CBR 600rr 1000rr 954rr CBR600rr CBR1000rr &ndash; 8 mm Swing arm Slider Spools by GPI Industries Each 8mm swingarm slider spool is precision CNC machined from High Impact DuPont Delrin Polymer resin Superior toughness and strength with reduced wear and friction during impact Lightweight yet strong and will not shatter or dig in when hitting pavement High grade steel mounting hardware. Each swingarm slider comes with a solid aluminum core for added strength. Do not be fooled by cheaper, smaller spools that break off easily without aluminum cores and are made from plastic