Description
This is a direct replacement threaded nib insert for TWSBI Diamond 530, 540 and 580 fountain pens.
Specifications:
Brand: TWSBI
Nib material: Polished steel
Nib color: Silver
Fitment: Diamond 530, Diamond 540, Diamond 580
Nib Sizes: EF, F, M, B, Stub 1.1
Specifications:
Brand: TWSBI
Nib material: Polished steel
Nib color: Silver
Fitment: Diamond 530, Diamond 540, Diamond 580
Nib Sizes: EF, F, M, B, Stub 1.1
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