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How to distingusih the filament?

How to distingusih the filament?

Solid, hollow, Cross-section? Solid: Advantage: it is softer tip and Smooth Disadvantage: Heavy and not much good painting absorption Mini Hollow: Advantage: Good Pianting Absorption and light Disadvantage: Rough Cross-section: Advantage: Good Painting Absorption Disadvantage: the body is hard, not softer.
How to distingusih the filament?
Which one do you like?