This is a case with markings from Russian lenses, such as FED and LZOS. It seems to be for lenses and accessories. The sizes are as follows: ① First photo, left Body width: Approximately 58mm Body depth: Approximately 43mm Lid depth: Approximately 20mm (9mm excluding the threaded part) * It tapers a few millimeters towards the bottom. ② First photo, right Body width: Approximately 53mm Body depth: Approximately 42mm Lid depth: Approximately 26mm (12mm excluding the threaded part) * Cylindrical. It has a structure to securely store something. Please forgive any slight errors due to amateur measurements. This is a used item. Please judge the condition of the exterior from the photos.