Sun manufactures customized cartridges and/or manifolds for special end-user applications, primarily OEMs. Custom products are identified with custom model codes consisting of 10 alphanumeric characters.These part numbers are stamped on one surface of either a cartridge hex body or a manifold.

Custom model codes are searchable.

Example of a custom model code: A503-229-C99

Note: Custom model code information is proprietary and can only be given to the OEM who requested it.