Robert Oster Ink,50ml - Thunderstorm _related_related-to-kaweco-sport-bp Lightweight plastic body in Shadow

Lightweight plastic body in Shadow Green with orange accent hardware

Keep your favorite writing instrument close at hand with this elegant and functional pen holder

Press again and it retracts just as smoothly

Blank paper

Printed on pH-neutral

Robert Oster Ink,50ml - Thunderstorm _related_related-to-kaweco-sport-bp Lightweight plastic body in ShadowRobert Oster Thunderstorm is a premium fountain pen ink known for its deep, storm inspired tone and reliable performance on fountain pen friendly paper. This rich bluish gray colour delivers balanced saturation with subtle shading variation, making it suitable for everyday writing, journaling, planning, and creative projects. Formulated for smooth, consistent flow and minimal feathering, Thunderstorm performs dependably across a variety of nib sizes