The Acerbis 2.0 Chain Guide Block easily replaces the entire OEM unit and ensures durability 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.FEATURES 100% PA6 construction Highly resistant to shock and chain wear Made of 2 pieces, allowing to be mounted without removing the chain In the event of collision or contact with roost, material won't bend Direct replacement chain guides All chain guides are for 125cc up