Max levels for equipment depends on their rarity. 

Max levels are as follows: 

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Rarity 1 (★1): Lv10 

Rarity 2 (★2): Lv20 

Rarity 3 (★3): Lv30 

Rarity 4 (★4): Lv40 

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*These levels are only for equipment before Limit Breaks. 

*Levels will increase after Limit Breaks. 

Refer to the entry about “Equipment Limit Breaks” for more details.