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12 PCS Standard Size Metal Converter(Caliber: 0.11 inches, length: 2.75 inches)Quickly and easily refill your fountain pen with bottled ink
Simple plunger action mechanism draws bottled ink with a simple twist
Fit all Jinhao,Baoer, Fuliwen Pen and 95% Chinese Pens.
Refillable converter saves money while reducing waste associated with disposable ink cartridges