Features a molded polycarbonate outer shell for durability, a foam interior and working latches and metal hinges - just like the real thing! The included insert will fit any bullet cartridge pen, from Mini pens to Over and Under Shotgun pens and even 50 Cal styles. Easily add a 2 pen insert (not included) to present a beautiful pen set. The box measures 8 in. long x 3 in. wide x 1-1/4 in. high.