Assorted Colour Pack Hongdian Fountain Pen Ink Cartridges, 6 Packs - 30 Cartridges -Black, Blue, Green, Red, Purple, Light Blue, 3.4mm Bore Diameter by Amazon.co.uk

• [ LARGER PACK ]: Set of 30 PCS cartridges in 6 colour, 5 quantity for each color ( Black, Blue, Green, Red, Purple, Light Blue )

• [ DIMENSION ]: Length Appr 51mm; Cartridge Diameter Appr4-7mm; bore diameter 3.4mm ( compatible with fountain pens take 3.4mm cartridges such as hongdian)

• [ 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.ountain pen ink cartridges refills have been carefully manufactured using only natural dyes giving the composition a neutral, natural, and non-toxic PH

• [ EASY TO WRITE ]: With no break in ink flow, enjoy a smooth and optimal writing experience as your fountain pen glides elegantly across paper.