Uni-ball Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.38mm, Set of 4 (Japan import) [Komainu-Dou Original Package]
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							Refill for Uni-ball Signo RT1 UMN-155-38, Uni-ball Signo RT1 UMN-155C-38.
							
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							Ink color: Black
							
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							The diameter of a ball: 0.38 mm. extra-fine type.
							
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