You are looking at AO1017 (94752) , the Authentic tamiya AO520 (Bulk Packaging)
these AO520 came from Double layer roller package or Regular Tamiya 13/17/19mm ball bearing rollers, which the defective or roller got destroy due to CNC process sometimes will fail in certain rate!
come with no tamiya packaging, only plastic bag.
Ball bearing 100% brand new, also consider as “New Pull” from Brand new rollers
The picture showed , it is actual picture of the ball bearing you will receive~