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 energy 2. 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 livestock 3. 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 fading 4. 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 intact 5. 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 breeders Specification: Item Type: Ear Tag Pen Color: Black Material: Plastic, Ink Usage: For writing marks on animal ear tags Weight: Approx. 27g / 0.95oz. Package List: 1 x Pen 1 x Pen Refill Note: When using for the first time, tap the nib and wait until the nib turns black to write.