THESE ARE HIGH QUALITY VARIABLE INDUCTOR SHELLS, THE TUBE IS MADE OF CERAMIC MATERIAL AND THE BODY IS HARD FIBERGLASS MATERIAL. THESE ARE FROM MILITARY HANGER SURPLUS. I DO NOT HAVE THE SLUGS THAT GOES WITH THESE INDUCTORS. 

THE INDUCTOR MEASUREMENTS ARE:

TOTAL HEIGHT IS 12MM EXCLUDING THE PINS

THE CERAMIC TUBE IS 7MM IN DIAMETERS AND THE INNER DIAMETER IS 3.5MM BUT I USED A 4.5MM SCREW AND IT SCREWS IN SMOOTHLY. I BELIEVE THE TREADS MIGHT BE 1MM

THE FIBERGLASS SECTION IS 11MM IN DIAMETER.