Half-markers: 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.
Colors included in Collection:
B0.6, BV4.7, O2.5, OR1.1, OR2.2, OR2.5, OR3.4, OR3.7, OR3.8, R0.5, W-G7, W-G9, Y2.0, Y2.3, YO2.5, ZERO