Expansion Pak for the Nintendo 64 video game console. Increases the available memory from 4MB to 8MB. (It was a lot at the time.) Required for certain games. OEM original product by Nintendo, not a third-party item. Tested and working. Please check my other items, as I have many other Nintendo games listed for sale. Free shipping anywhere within the U.S. International shipping will vary by destination; please ask if interested. I welcome lower offers, especially if you are buying multiple items at once. To make a lower offer, add the item(s) to your cart and on the checkout page you will be given the option to name your own price. (If you are not seeing this option, it may be because your state requires sales tax. Bonanza is working on a fix for this issue, but you can also send me a direct message with your offer.) Full information about making offers here. [JSC]