Scotts Performance Shark Fin Disc Guard 2004-2014 Honda CRF 250X / 2002-2013 CRF 450R / 2005-2014 CRF 450X SFN-2002 The SCOTTS Sharkfin is 3/8" thick billet 6061 aluminum, 25% thicker than any others on the market. It is the only fin that incorporates the brake caliper carrier as an integral part of the function. The axle passes throught the shark fin making it virtually indestructable and your brake rotor protected from defeat. This design is 10 times stronger than the "Bolt-On" type fins and it's a beautiful piece of work. Mfg# :SFN-2002