Polisport continue to break barriers in off road plastic parts technology setting the mould of the future. Polisport chain guides & swing arm protectors are produced with Durable Gloss Polypropylene (DGP) technology that provides maximum resistance to impact and also has extremely high resistance to premature wear breakage and discolouration. Fits: Yamaha WR450F 2003-2006 YZ125 2003-2004 YZ250 2003-2004 YZ250F 2003-2004 YZ450F 2003-2004