Rohrer & Klingner Dokumentus Waterproof Fountain Pen Ink, 50 ml, Green Mechanical Pencils Rollerball can be converted to

Rollerball can be converted to ballpoint

Quick change nib assembly

Handcrafted with watchmaker's tools for precision

6 mm or 4-1/4")

Pre-loaded with Pentel Super Hi-Polymer HB lead

Rohrer & Klingner Dokumentus Waterproof Fountain Pen Ink, 50 ml, Green Mechanical Pencils Rollerball can be converted toRohrer & Klingner Dokumentus Waterproof Fountain Pen Ink, Green, 50 ml Dokumentus is the world's first fountain pen ink conforming to the resistance requirements of DIN ISO 12757 2. It has been tested by an independent standards body (Papiertechnische Stiftung Heidenau) and certified that this can be used by registrars for official documents. New technology and high quality raw materials used to formulate this new pH adjusted ink guarantees permanent