The universal pens for school children, students and professionals, these fine point pens feature water-based ink in vibrant colors, formulated to sustain a long cap-off time. The uniquely-designed, long-wearing tips are encased in metal, so the pens can be used with rulers and stencils. The caps are ventilated for safety the pens come in a convenient roller case for storage and travel.Details: Includes assorted colors 0.4 mm tip size 6 sets (25 pens and 1 roller per set) Water basedIncludes roller case Sustains long cap-off time Long wearing tips Caps ventilated for safety Ideal for use with rulers and stencils