This is a lot of 5 N64 memory cards. They are made by Hip Gear and are brand new. Note the picture shows 25, but only 5 are available at a time. If you want more than 5 you can just buy more than one of these lots.
They are brand new, in little plastic bags. They are yellow and work with the N64. Just plug it into the back of your controller and youre good to go.