Dual-Tip Design: The markers feature a dual-tip design with both a bullet and chisel tip, providing versatility for a variety of creative applications. Vibrant Colors: The oil-based ink produces bold, vibrant marks that are perfect for drawing and writing. Acid-Free, Archival Quality: The markers are acid-free and archival quality, ensuring your artwork will last for years to come. AP-Certified Non-Toxic: The markers are AP-certified non-toxic, making them safe for use in any environment. Comfortable Design: The markers feature a triangle barrel design that is comfortable to hold, allowing for extended use without fatigue. Whether you're a professional artist or a hobbyist, the Kalor Oil-Based Markers are the perfect choice for all your creative projects.