edding 90 Glassboard Marker, 2-3mm Bullet Tip, Light Blueedding 90 Glass Board Marker High quality writing on glassboards and most glass surfaces edding 90 glassboard marker Glassboard marker for writing and marking on glassboards and most glass surfaces. The writing is easily dry wipeable from glassboards. The round nib has a stroke width of 2 3 mm. The glassboard marker ink has opaque and brilliant colours. The glassboard marker ink is lightfast. Easily residue free dry wipeable, opaque and brilliant