Round Barrels Are Flexible To Hold And Never Bring You Fatigue! The Colors Are Vibrant And Well Pigmented With Numbers On The End Of The Markers. Non-Toxic and Wont Skip. The tip of the marker pen should not stay on the paper too long, otherwise the ink will come out. Markers needs to write on a specific marker paper or thick paper at least so that it doesn’t penetrate to the next layer.
