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Main gear (main belt pulley) include one way bearing
Note:
1) Included Main gear-1pcs,one way inner set-1pcs,belt pulley-1pcs,one way bearing(4΅Α6΅Α8mm)-1pcs,big gear center mount-1pcs,screws(1.4΅Α3mm)-3pcs.
2) The main gear adopts the POM material.