text: Replacement Ink Cartridges hold 2ml of OLO alcohol ink. Marker cap, nib, and Connector Rings are not included with Replacement Ink Cartridges. However, additional OLO Connector Rings, replacement nibs, and other accessories are available. Marker bodies are color-coded for quick nib identification. The black marker body identifies the brush nib, while the dark gray marker body indicates the chisel nib. All OLO nibs work with all OLO Replacement Ink Cartridges.
  Note: Nib and standard marker cap are not included. Reuse your marker cap and nib (or replace the nib) from your empty half-marker.