The OLO is not just another marker! Its unique design lends artists complete customization control, from the ink to the nib. Just unscrew one end from the other to mix and match. They also hold twice as much ink as any other alcohol marker!
One OLO half-marker has 2ml of ink, plus over 90% more usable ink than other alcohol markers. Use an OLO Connector Ring to combine any two half-markers for a double-ended marker with 4ml of ink. Combine half-markers to create unique double-ended markers that feature your choice of colors and nibs.