✅ LARGER PACK: 30 pack of 3.4 mm bore diameter black ink cartridges ( compatible with fountain pens take 3.4mm cartridges such as hongdian, parker and wing sung )
✅ DIMENSION: Length Appr 51mm; Cartridge Diameter Appr4-7mm; bore diameter 3.4mm
✅ SMOOTH INK FLOW: With no break in ink flow, enjoy a smooth and optimal writing experience as your fountain pen glides elegantly across paper.
✅ NEUTRAL PH & NON-TOXIC: The ink has been carefully manufactured using only natural dyes giving the composition a neutral, natural, and non-toxic PH.
✅ QUICK TO DRY: HongDian Designs ink takes only a few seconds to dry ensuring your important writing moments are not ruined by smudges or smears.