1. Animal microchips are compliant with ISO11784 ISO11785 FDXB international standard. Chip scanners and readers can read the 15 unique ID numbers of our 134.2Khz operating frequency chips. ICAR certified, with reliable and assured quality. 2. Please choose the right size for your pet or animal. A 1.4X8mm microchip is for dogs, cats, puppies, chickens, ducks, owls. A 2.12X12mm microchip is for large dogs, horses, cows, sheep, pigs, camels and other large animals. A 1.25X7mm size is for small fish, mice, hamsters, snakes, frogs, pigeons and other very small animals. 3. Antishedding device ensures that the builtin electronic tag will not fall off before implantation. Comfortable to hold, ergonomic. 1.25mm or 1.4mm or 2.12mm tiny needles, ier for handling, simple, and convenient operation. 4. Benefits of pet microchip implantation: provides a unique identification code for pets, can be used as a pet's ID card for life. After implanting the chip, it can quickly and accurately identify and confirm. After the pet is lost, it can be confirmed in a timely manner. It is convenient to query the pet's previous epidemic prevention and disease conditions, and targeted measures can be taken. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.