Voyager Model of China is a manufacturer of some of the best photo-etched metal and resin detail parts in the industry! They are, as it says right on the box, "The Best Upgrade Solution!" They do boats, too!
This set features two frets of photo-etched metal parts, as shown.
Kurohakama-cho 162-1, Sano, Tochigi 327-0813 JAPAN