- Versatile Size Options: This sketch rubbing sponge brush set includes two sizes to cater to various artistic needs. The larger brush features a tip diameter of 0.47 inches (1.2 cm) and a total length of 5.94 inches (15.1 cm), while the smaller brush has a tip diameter of 0.24 inches (0.6 cm) and a total length of 5.51 inches (14 cm). This variety allows artists and students to explore different techniques and styles. - Innovative Double-Headed Design: Each blending sponge pen is equipped with dual tips for enhanced functionality. The black tip of the larger brush is ideal for creating shadow transitions and preliminary blending, while the black tip of the smaller brush is perfect for intricate detailing. The white tip of the larger brush transitions halftones to light and shadow, making sketches more dynamic, and the white tip of the smaller brush is designed for detailed areas. - Generous Quantity: Each package includes 24 blending stumps in two sizes, making it ideal for art classes or group projects. This ample supply ensures that you will always have the tools you need on hand for any drawing or sketching task. Note that some black wool may be present in the white felt tips due to the natural wool processing, but this does not impact performance. - Durable and Comfortable Materials: Constructed from quality sponge, felt, and ABS plastic, these sketching wipe pens are designed for longevity and comfort. The sponge black tips provide smooth blending, while the sturdy ABS shell ensures a comfortable grip and extended service life, enhancing your overall artistic experience. - Practical Use Scenarios: Use these pens for various applications, such as blending sketches in art classes, creating detailed illustrations, or enhancing shading techniques in personal projects. Whether you are a student honing your skills or a professional artist, these blending pens are essential tools for achieving stunning results.