The Pineider Snorkel is a stainless steel extender with an adapter nozzle that fits most popular fountain pen converters. Just plug the nozzle into the converter, place the extender tube into bottle ink, and twist the converter to fill it! It keeps your converter full without having to dip your nib into ink, saving you unwanted drips and inky fingers! The Pineider Snorkel also allows you to get every last drop of ink in a bottle. Its suitable for all Western converters except for Japanese fountain pen converters.