Features1EXQUISITE PROCESS: Chain ring adapter adopts forging process, no corrosion or deformation 2WEAR RESISTANT MATERIAL: All aluminum alloy chain ring spider adapter has low density, good performance, firm and wear resistant 3APPLICABLE MODEL: Used for Bafang M200, M215, M315, M410, M420, M300 electric bicycle chain crank set of 42T 4AVOID SCRATCHES: Sprocket adapters can protect your bike from scratches and extend service life 5LIGHT AND PORTABLE: Sprocket is small in size, light in weight, easy to carry, simple to install and useSpecificationItem Type: Chain Ring Spider AdapterProduct Material: Aluminum alloySpecifications: 42TScope of Application: Suitable for Bafang central motor M200, M215, M315, M410, M420, M300Package List1 x Chain Ring Spider Adapter