This item is a set of white metal or photo-etched parts for detailing AFV kits.
Assembly Guide
Photo-etched detail set for the Gunze 1/35 StuG III Ausf.G Late model kit (GNZG-732). Includes schurtzen (side armor skirts/plates) stay, air intake grills, hold downs, tools, and more. Two large stainless steel frets of parts; also includes a name plate for the base. Very detailed set of instructions. Set is produced by Eduard in the Czech Republic, and marketed by Gunze Sangyo in Japan.