Replace worn-out markers in a classpack or several individual sets with convenient refills. Crayola markers have vibrant colors, durable nibs and a generous ink supply. Water-based, with almost no odor, they last far longer than most children's markers. Crayola Broad Line markers have a conical tip for wide strokes. Washable formula washes from most surfaces with soap and water. 12 markers per package. Yellow. AP Seal, non-toxic.