Condition: New Material: UHMW-PE (ultra high molecular weight polyethylene), aircraft grade aluminum No cut or plastic fairing modifications required Fit models: Yamaha 2006 - 2015 FZ1 2011 - 2015 FZ8This purchase is for a pair of frame sliders for the models mentioned above. The sliders are made of Aluminum Alloy 6061-T6 and UHMW-PE (ultra high molecular weight polyethylene), a tough plastic with good strength, wear resistance and dimensional stability. It is more dimensionally stable than Nylon and used in many industrial ball bearing and friction reducing applications. The bolts are made of highest grade commercially available 12.9(177,000 psi in tensile strength). Rest assured that you are getting the best material commercially available.