5 toroid cores, ¾ inch OD ½ inch ID, no number on them but color-coded black with one side red (kind of orange), smooth enamel paint job, new old stock. I believe these are made of Micrometals powdered iron type 14 material, which would make the part number T80-14. That type is an excellent RF core material for use up through the HF bands. Like baluns, matching transformers, and inductors.