These pens have a water-based ink that won't bleed through your paper (applies to paper weights of at least 80 grammes)

The pens are filled with black permanent pigment ink which is acid-free

Mini version of the classic On The Run OTR

The Uni Chalk Marker PWE-8K Broad has a 8 mm chisel tip

on the run otr 006 soultip paint squeeze marker 6 mm Colors:Blazing Red These pens have a water-basedMarker made from soft plastic, that is squeezable so it gives you maximum control over the inkflow. The colour in this pen is the Soultip Paint from On The Run, an opaque glossy lacquer paint. The pen is equipped with a durable tip that measures 5 mm in diameter. It is refillable, and the tips can be changed as well when needed. Shop all On The Run products here.