Feature:1. For TPU Material: This black ink marking pen is designed for TPU material ear tags, ensuring a smooth and effortless application process, leaving clear marks, saves you time and energy2. Safe Ink: This ear tag pen uses specially crafted ink that is harmless to animals. You can apply it with peace of mind, knowing that it poses no damage to the skin or body of your livestock3. Long Lasting: Engineered with a ink that deeply penetrates the surface of ear tags, our marker pen ensures that your markings remain clear and visible for an extended period, resist fading4. Water Proof Ink: This ear tag pen utilizes strong penetration ink that offers water resisting. Whether your livestock are exposed to rain, mud, or other wet conditions, the ink will remain intact5. Efficient Identification: Suitable for marking the ear tags of pigs, cows, sheep, and other livestock, this pen offers a quick and easy way to identify animal, for farmers, ranchers, and animal breedersSpecification:Item Type: Ear Tag PenColor: BlackMaterial: Plastic, InkUsage: For writing marks on animal ear tagsWeight: Approx. 27g / 0.95oz.Package List:1 x Pen1 x Pen RefillNote:When using for the first time, tap the nib and wait until the nib turns black to write.