edding 4095 Chalk Marker, 2-3mm Bullet Tip, WhiteHigh quality writing on blackboards and glass edding 4095 chalk marker Chalk marker for non permanent designing, decorating and writing on non porous surfaces, e. g. windows, dark boards, glass and mirrors. The round nib has a stroke width of 2 3 mm. The opaque, water based liquid chalk with a neutral smell can be wiped off virtually all non porous surfaces with a damp cloth. Opaque liquid chalk in a marker format. Easy handling Unlike standard chalk,