Color = Black, Blue, Red Material = UHMW-PE (ultra high molecular weight polyethylene) NO CUTTING or plastic fairings modification Fit Models = BMW 2015-2016 S1000RR BMW = Frame sliders for the above bike model. The sliders feature the new design of complete solid puck without hollowed-out center. This increases the strength and contact surface to about 30%. The slider (black) spacer is machined from 6061-T6 aluminum. The spacer is bolted to the engine mount and the slider puck is screwed onto it. Since this spacer is made of solid billet aluminum there is no need for re-tightening the engine bolt in the long run where you have to do so with plastic slider as the plastic would gradually give in and therefore making the bolt loose. The puck material 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. Compared to Delrin, it is s 2010 - 2011 T-Rex BMW S1000RR Frame Sliders NO CUT ofter but tougher. Delrin is harder but more brittle. It is an ideal material for slider since it can absorb more impact force onto itself and therefore reduce the impact on the frame and engine. The slider pucks can be inexpensively replaced in case of a low-side. We use highest grade commercially available 12.9(177,000 psi in tensile strength) wherever possible. Rest assured that you are getting the best material commercially available. The frame sliders that you will receive will most likely be the ones pictured above. However, due to constant improvement, the frame sliders can sometimes vary slightly from those in the picture.