Fiber-tipped sign pen offers a durable porous tip that is excellent for general writing, drawing, doodling and adding character to any signature. Radiant, water-based ink is perfect for any time you put ink to paper. It is ideal for use in the home or studio by artists, designers and anyone who enjoys writing or drawing. Snap-fit cap prevents the firm, durable tip from drying out when not in use. Nonrefillable Sign Pens are certified AP nontoxic by ACMI.