Package Inclusions This set includes 4 blending sponge pens in 2 sizes, providing ample supply for personal projects and art classes. Note: the white felt tip may contain black wool; this does not affect performance. Superior Quality Materials Premium sponge, felt, and a sturdy plastic shaft form the core of each pen. Each blending pen features a black sponge tip and a white felt tip to enable seamless blending. The durable plastic shaft offers a comfortable grip and is washable and reusable. Sizes to Meet Different Needs Large pen: nib diameter approximately 0.47 inch (1.2 cm), total length 5.9 inch (15 cm). Small pen: nib diameter approximately 0.24 inch (0.6 cm), total length 5.51 inch (14 cm). Innovative Dual-Tip Design Each pen combines two tips for versatile use. The large pen’s black sponge tip is ideal for shadow-side transitions, while the white felt tip handles halftones and blending on light and dark sides. The small pen’s black sponge tip is suited for fine detailing to enhance sketch definition. Use scenarios - Shading portraits or landscapes: create smooth transitions from light to shadow for a natural look. - Marker-based illustrations: blend colors in fashion sketches or comics for seamless gradients. - Fine detailing and edge work: use the small pen’s black sponge tip to add precise accents and refine intricacies in small drawings.