Ample Quantity: the package includes 24 pieces of blending stumps, in 2 sizes; This ample quantity makes it suitable for group activities in art classes and can also as a useful addition to your art kit, ensuring that you will always have pens on handy while working on your . Due to the manual processing of natural wool, the white felt tip may contain some black wool, but does not affect the actual use Practical Double Headed Design: the blending sponge pen features a practical double headed design,the black tip of bigger pen is applied for shadow side transition, perfect for preliminary blending, the black tip of smaller pen is utilized to handle the detailing, the white tip of bigger pen is suitable for transitioning halftones to light and shadow sides or blending the light side,making your sketch more dynamic and visually appealing,you can use the white tip of smaller pen on detailed sides Appropriate Size for Application: this sketch rubbing sponge brush comes with 2 different sizes to meet your needs; The bigger pen measures about 0.47 inches/ 1.2 cm in tip diameter and about 5.94 inches/ 15.1 cm in total length, while the smaller pen is about 0.24 inches/ 0.6 cm in tip diameter and about 5.51 inches/ 14 cm in total length; For an artist or student, this in sizes means more room for creativity Reliable and Comfortable Material: the sketching wipe pen is made of quality sponge, felt and ABS, the black tip is made of sponge, and the white tip is crafted from felt, helping to blend different sides smoothly; The sturdy ABS ensures durability, comfortable grip, and long service life, providing a pleasant experience Wide Range of Uses: this blending sponge pen set is an perfect and useful tool for art enthusiasts, students, or beginners; It allows your blending and shading effortless and convenient, creating beautiful gradients and shadows in your artwork; The pen is suitable for most occasions, whether it be art projects, school assignments or hobby crafting<br><br>Colour:As Shown Material:sponge<br><br>Package Contents: 24 x Sponge Brush<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.