It's for Super Famicom I think. I don't really know if you can use it for Super Nintendo, but I've seen these before where you can. This is a device to save cartridges on 3.5" disks.

No disks. Complete in box, although no apparent instructions. First $50 to my paypal gets it shipped to the US or Canada. It will cost more to ship outside of the US or Canada, at additional cost.