ECO (Transparent Blossom) - Broad peach Robert Oster Signature Ink -

Robert Oster Signature Ink - Crocodile Green

Astrophysics Collection (Season 2)

Their patented “Slip & Seal Mechanism” introduced across the fountain pen range provides an air tight seal that prevents ink from drying out for long periods of time

This pen features a 14-karat gold nib and comes with a CON-70 converter and a gift box

Robert Oster Signature Ink - Viola

ECO (Transparent Blossom) - Broad peach Robert Oster Signature Ink -TWSBI's ECO fountain pen has always been a great choice for beginners and long time users alike due to its affordability and quality. Fitted with a piston fill mechanism, the ECO has a large ink capacity at approximately 1. 7ml.