How are Used Golf Balls Graded?
Pristine:

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Appear almost brand new.
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Very little to no wear present.
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Slight player markings (dots, small lines, etc.) may be present.
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Logos may be present.
5A:

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Appear brand new (with small Refinished by Links Choice stamp).
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Refurbished via stripping, painting, stamping, & clear-coating used golf balls.
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Best value for fraction of the price brand new, while still performing similarly.
4A:

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Appear like a ball that has been played for a hole or two.
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Will show signs of slight wear. These can include, but are not limited to: slight cosmetic defects, small cover scratch, slight discoloration. Blemishes will not affect play-ability of the ball.
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May contain larger player markings than Mint.
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May contain logos.
Mix:

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Will show signs of wear. These will appear visibly used.
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No cut balls are present, but balls with small scuffs, scratches, discoloration, visible cosmetic defects, etc. are present.
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Will contain large player markings.
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May contain logos.