This is a Leica type dual cylinder cassette made by FED. This cassette was the ideal solution for spooling film, since it had no felt which trapped dust and scratched film.
The cassette will work with most FED and Zorki cameras on the feed side.
Please note - this cassette does not work on bottom-loading cameras (such as FED 1 and Zorki 1). It works with FED-2, -3, -4, -5, Zorki-3, -4, -4K.
Please ask about your camera - I will test if it works in it.