A nickel plated .308 (7.62 x 51) cartridge case that has been machined with a 7mm tube glued inside.
The cartridge cases are from once-fired ammunition and as a result may have slight scratches or small dents. This is considered normal. If desired, you can clean and polish the cases before you assemble the pen using a metal cleaner (like Flitz).
The manufacturing process has rendered the cartridge case unusable as ammunition. However, Bear Tooth Woods does not know the legality of importing these blanks into foreign countries. So please be sure to check with your customs officials before ordering for international delivery.