The microchip world has moved to the ISO standard. We only manufacture the Certified ISO standard as it recognized worldwide and can be read by scanners in use across the USA. For international travel, your pet is required to have a 15 digit ISO microchip.
* Beware:  Do not use an ISO chip that begins with the first three digits of 900 (nine-zero-zero).  These are shared temporary ISO manufacturers who are not in the USA, making it is nearly impossible for a lost pet to be reunited with his owner, especially if the chip has not been registered.