Green Diamond - 50ml twsbi-ink Robert Oster Signature Ink -

Robert Oster Signature Ink - Red Candy

The lower cap is for all other TWSBI pen models

Sailor took on board colour suggestions from their customers over the years and present to you now

When posted

Proudly made in the Philippines

Green Diamond - 50ml twsbi-ink Robert Oster Signature Ink -Robert Oster Signature Ink Green Diamond Discover Green Diamond, a signature fountain pen ink handmade in Australia with a focus on sustainability, performance, and vibrant color expression. Non toxic formula safe for everyday fountain pen use Bottled in recyclable PET made at Australia's first carbon neutral plastics facility Produced in small batches to ensure quality and reduce waste Smooth Writing and Rich Expression Flows consistently with