Features: 1.Superior steel nib, high?hardness, improves the marking effect, durable to use. 2.Suitable for being used on light color leather, convenient and practical to use. 3.Disappear when the temperature reaches about 60, and will reappear at ?10. 4.Suitable for temporary marking on shoes, clothing and leather, wide application. 5.Including 100pcs pen refills, which can completely meet your needs. specification:Condition: 100% Brand New Item Type: High Temperature Disappearing Pen Refill Shell Material: Plastic Pen Point Material: Steel Color: As picture shown Total Length: Approx. 13cm/5.1in Quantity: 100pcs Uses: Used for temporary marking on shoes, clothing and leather. Use Instructions: 1. This product will disappear when the temperature reaches about 60. 2. Used for temporary marking of shoes, clothing and leather 3. The use of high-hardness steel head improves the marking effect and is durable 4. Used on light color leather. 5. Will reappear at -10. PackageList:100 x High Temperature Disappearing Pen Refill Note1. Since the chemical composition and physical properties of different materials are different, please make a small test before putting it into production. If you find that the effect is not good, please stop using it. 2. After use, please cover the pen cap in time and store in a cool place, avoid direct sunlight, so that the effect is still good next time. 3. This product is only used for industrial production marks, please do not use it for writing, signing and other important documents.