Replacement Ink Cartridges hold 2ml of OLO alcohol ink. Marker caps, Nibs, and Connector Rings are not included with Replacement Ink Cartridge. However, additional OLO Connector Rings, replacement nibs, and other accessories are available. Marker bodies are color-coded for quick nib identification. All OLO nibs work with all OLO Replacement Ink Cartridges.

UNPARALLELED VALUE

Each OLO half-marker contains 2ml of ink, for a total of 4ml in an OLO double-ended marker. Traditional markers only have approximately 2ml of ink total. OLO's patented free-flow ink technology utilizes over 90% of the ink compared to standard marker technology, with only 65-70% ink usage.