Machined by CNC machine, the rear disc protection is made of aluminium 10mm of thickness mixed to plastic (HDPE) 12mm of thickness Aluminium allows a strong fixation while the hard plastic give to your bike a good protection Thanks to the flexibility of the plastic, your disc brake will be protected all the way without any risk of be blocked by a bent part as aluminum could be. REAR DISC GUARD KTM-HUS-SHERCO ENDURO