The ink converter mechanism is simple to use, making it great for both beginners and experienced calligraphers. To use, simply insert the converter into the pen's section, twist or push to draw ink from the bottle, and you're . This universal ink converter is compatible with a wide range of fountain pens, including those from brands like Sailor and , ensuring you can always find the for your pen. Features -Color:Multi -Material:Stainless steel and plastic -Size:12.00X0.70X0.70cm/4.72X0.28X0.28in -Versatility: these converters are essential accessories for calligraphy enthusiasts, providing a reliable solution for ink filling. -Portability: different styles of pen spring fillers with a compact and lightweight design make them easy to carry wherever you go. -Ease of use: the vacuum spring design allows for easier ink filling, and the converters can be easily disassembled, cleaned, and installed. -Sharing: with enough quantity, you can meet your daily needs and share with family and friends, enhancing your writing experience. -Safety: the product is and includes pointed items, so it is important to keep it away from children to ensure safety Package list: 9 x fountain pen converters