- Double-Tip Design: The larger pen features a black tip for shadow transitions, ideal for creating depth, while the white tip is perfect for blending halftones between light and dark areas. The smaller pen's black tip is designed for intricate detail work, enhancing the dynamism and appeal of your sketches. - Package Contents: This set includes 6 blending pens in two sizes, providing ample tools for personal use or art classes. The white felt tips may contain trace amounts of black wool, but this has no impact on their functionality. - Durable Materials: Crafted from high-quality sponge, felt, and a sturdy plastic core, the black tips (sponge) and white tips (felt) allow for seamless blending. The robust plastic construction ensures long-lasting performance and comfort during use. They are washable and reusable, making them an eco-friendly choice. - Size Specifications: Available in two convenient sizes, the larger pen has a nib diameter of approximately 0.47 inch (1.2 cm) and a length of 5.9 inches (15 cm). The smaller pen measures a nib diameter of approximately 0.29 inch (0.75 cm) and a length of 5.51 inches (14 cm), catering to diverse blending needs. - Practical Applications: These blending pens are ideal for various artistic endeavors, including sketching, drawing, and coloring. Use the larger pen for wide areas and transitions, and the smaller pen for fine details and texture work. Perfect for artists, students, and hobbyists alike, they enhance your creative toolkit significantly.