UNIVERSAL COMPATIBILITY: Standard push-style piston ink converter designed to fit most fountain pen brands and models EFFICIENT DESIGN: Features a smooth-action piston mechanism for reliable and consistent ink filling from bottled fountain pen ink EASY TO USE: Simple twist operation allows for quick and clean refills without mess or waste DURABLE CONSTRUCTION: Made with quality materials for long-lasting performance and reliable daily use PRACTICAL SOLUTION: Eliminates the need for disposable cartridges while providing greater ink color selection options Universal Fountain Pen Ink Converter Standard Push Piston Fill InkAbsorber and Writing and Correction Supplies Pens and Refills Office Supplies