The Chain Guide Block easily replaces the entire OEM unit and ensures durablity and high resistance to shock and wear from the chain. Made of PA6, it is made of two parts that allow installation without removing the chain.100% PA6 contructionHighly resistant to shock and chain wearMade of 2 pieces, allowing to be mounted without removing the chainIn the event of collision or contact with roost, material won’t bendCOLOR: RED BLACK WHITEFit :CRF250R:07-16 CRF450R 07-16