Package information: there are 12 pieces of reusable blending stump drawing, double head design, comfortable to hold and easy to clean; They are available in 2 sizes, very suitable for developing shadow or creating a fade from dark to light; Our blending stump is good for blending pencil, charcoal and pastels; Doesn't work with paints Suitable Size for Application: this sketching sponge brush comes in 2 different sizes to fit your needs, The larger pen has a tip diameter of approximately 0.47 inch and a total length of approximately 6.1 inches, while the smaller pen has a tip diameter of approximately 0.24 inch, a total length is approximately 5.51 inches; Multiple sizes mean more room for creativity, beautiful and sturdy workmanship for long term use Performance: the black nib of the larger pen is applied for shadow side transitions, for preliminary blending, the smaller pen is applied for working on details; The white nib is applied for working on details, the larger pen is good for transitioning halftones into light and dark sides or blending bright sides, making your sketches more dynamic and visually appealing, the smaller pen is suitable for adjusting the placement of details Practical Double Ended Design: blending stump gives you more control and they last longer; The blending sponge pen features a practical double ended design, offering a wide range of possibilities for blending and coloring; The black tip is perfect for softer sponges, has perfect texture, allowing for smooth blending; The white tip is made of harder felt, when using the white end, pay attention to how hard you press to avoid tearing the paper Versatility: this blending sponge pen set is an perfect practical tool for art lovers, students or beginners; It allows you to blend and color conveniently, creating beautiful gradients and shading in your works; The pen is suitable for most occasions, whether it's an art project, school assignment or hobby crafting, Weight: 0.2645547144 pounds, Manufacturer: Tuidzljd