With their sturdy bullet tips and brilliant, intense colors, these pens are perfect for layout detail and sketching. The ink will not bleed. It also will not dissolve toner or ink of permanent markers. Pens can be left without their cap for 24 hours without drying out. These sets include a variety of vibrant colors in convenient plastic wallets.Details:8 assorted colorsFiber tipLong lastingOdorless inkWater-based ink