Enhance your crafting and tailoring projects with this High Temperature Disappearing Pen Refill set, designed for precise and temporary marking on shoes, clothing, and leather materials. Featuring a high-hardness steel nib, these pen refills provide durable, clear, and effective markings that withstand regular use. Ideal for use on dark-colored leather, the white ink disappears at approximately 60℃ and reappears at -60℃, making it perfect for temperature-sensitive applications. Key Features: · High-Hardness Steel Nib: Ensures improved marking accuracy and durability for consistent, long-lasting use. · Temperature-Sensitive Ink: White ink disappears when heated to about 60℃ and reappears at -60℃, while other colors such as red, blue, and black reappear at -10℃, allowing for versatile marking needs. · Suitable for Dark Leather: The white refill is specially formulated for clear visibility on dark-colored leather surfaces. · Wide Application: Perfect for temporary markings on shoes, clothing, and leather, making it an essential tool for tailors, shoemakers, and leatherworkers. · Bulk Quantity: Includes 100 pen refills, providing ample supply to meet extensive project demands without frequent replacements. Specifications: · Item Type: High Temperature Disappearing Pen Refill · Shell Material: Plastic · Pen Point Material: Steel · Color: As shown in the picture (includes white, red, blue, and black) · Total Length: Approx. 13cm / 5.1in · Quantity: 100pcs Usage Instructions: 1. The ink disappears when heated to around 60℃. 2. Designed for temporary marking on shoes, clothing, and leather. 3. High-hardness steel nib improves marking clarity and durability. 4. Use white ink on dark leather; red, blue, and black inks are suitable for light leather. 5. White ink reappears at -60℃; red, blue, and black inks reappear at -10℃. This High Temperature Disappearing Pen Refill set offers a reliable and convenient solution for temporary markings, combining durability, precision, and temperature-responsive ink properties to support your professional and creative needs.