H E N G L I Z I D O N G H U APacking List1pcs immediately teeth rack 1Mod 10*10mm (The Length is optional.)Main features:High transmission power, long life, steady operation, high reliability, and a continuing transmission ratio.Note:1)the racks aren't processed and hardened.2)If the racks should be hardened,please contact me.3)We additionally give you the other size of the rack and gear. H E N G L I Z I D O N G H U A