this is a still sealed and as new. originally for Sega megadrive, master system and game gear but I have used the cleaning cards on other systems that I have with my own set.

inside the box is some plastic card's that you can put the cleaning fluid (included) on and clean cartridges and cartridge slots with ease to get your retro games playing again.

any questions please ask

ps I have more than one so if you want more just let me know.
thanks