With their sturdy bullet tips and brilliant, intense colors, Pen 68 fiber tip pens are perfect for layout, detail and sketching. The odorless water-based ink will not bleed or dissolve toner or ink of permanent markers. Pens can be left without their cap for 24 hours without drying out! These wallet sets include a variety of vibrant colors. Details:Includes assorted colors,Available in multiple countsFiber tipsCap-off time of up to 24 hoursOdorlessWater-based ink