BIC Intensity Fineliner Marker Pen, Fine Point (0.4mm), Assorted Colors, Clean & Crisp Writing, 5-Count. BIC Intensity Fineliner Fine writes like a pen, and is bold like a marker. This pen has bold colors, that won't bleed through paper (Results could vary based on paper characteristics). The pen features a fine tip (0.4mm) that provides smooth, colorful precision. The metal nib protects the tip from wearing down. This pen is perfect for note taking, creative writing, adult coloring, and journaling. The water-based ink makes it perfect for writing on paper and is AMCI approved non toxic. Bold colors, won't bleed through paper. Results could vary based on paper characteristics.