This part is a universal replacement plastic block for all AS3 Performance chain guides with the aluminium mounting bracket and plastic block. It is manufactured from hard wearing TPU plastic and is a direct replacement part and compatible with all models. Please note this is designed for AS3 Performance chain guides only and will not fit the OEM chain guides. Will Fit All AS3 Performance chain guides with the aluminium mounting bracket and plastic block (Will not fit our aluminium style chain guides or OEM chain guides) Features Direct replacement part for AS3 Performance chain guides Manufactured from hard wearing TPU plastic Universal fitment across our full range of chain guides with this style block Can be installed to the bike without having to split the chain We advise thread lock to be applied to all bolts on installation Maximum width for chain: 21mm Will not fit OEM chain guides All parts are in stock and ready for immediate despatch The chain guide in the picture is the exact part you will receive