These are brand new, SCT-1250-400A split core current transformers with 26.6mA output ratio. Similar items sold online well over $50.00. 

UL rated by Intertek. They are also IP20 and UL-94V fire rated and configured to work with EKM type electric power meters. They are 1% accuracy class and come with a snap enclosure and 2" inner diameter. Can be used for large cable for power monitoring on electric chillers and secondary power transformer.