Size: Length - 88mm capped; 123mm inches posted; 15mm max. diameter.
This is a very distinctive pocket style fountain pen made from transparent and semi-transparent acrylic, so it could be classed as a Demonstrator pen. It has the unusual distinction of being a dual-filling pen in that it can be used with standard International ink cartridges, and also used as an eyedropper pen using the included eyedropper pipette. t is fitted with a gold-plated iridium-tipped stainless steel nib in a fine point. It is supplied boxed with a pack if ink cartridges and an eyedropper pipette.
Moonman use the Parker style 3mm cartridge peg, so the cartridges you need are the Moonman brand (see below), or the Parker mini cartridges.