Brand = T-Rex Racing Material = UHMW-PE (ultra high molecular weight polyethylene) and a aircraft grade aluminum 6061-T6 brackets finished in black anodizing for durability. NO CUT or plastic fairings modification required Fit Models = Kawasaki 2017 - 2018 Ninja 650 / Z650 You will receive the exact kit shown in the top most picture! This purchase is for a PAIR of Engine Case Cover Sliders. That helps protect your bike engine case cover in the event of a low-side. The covers are made of 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. They can be inexpensively replaced in case of a low-side. 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 and fully thought out product.