Ergonomic triangular shape for relaxed and easy writing | Particularly smooth writing performance | Transparent barrel | Cap, tip and end plug in writing colour | Indelible ink conforming to ISO 12757-2 | Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft | 0.5mm Medium nib | Box of 10 | Colour: Light Green | OEM: 432 35M-51