Compatible Design – Spring converter fits fountain pens using 3.4 mm converters, such as Hongdian models, with the option to remove the syringe needle for direct filling.
Versatile Use – Ideal for filling or flushing fountain pen ink cartridges, converters, and bottled inks with precision and ease.
Simple Operation – Dip the needle tip into bottled ink, press the spring stick down, then release to draw ink smoothly into the converter.
Easy Assembly – Comes in three parts (converter, white connector, and needle); simply attach the parts correctly, using a cloth and a bit of grease if needed for the first assembly.
Industrial Use Notice – Non-sterile; intended for industrial and fountain pen maintenance purposes only.