This is a set of Tamiya Mini 4WD Grade-Up Parts: Reston Sponge Tires. - 15117 Reston Sponge Tires (Blue) - 15388 Narrow Reston Sponge Tires (Black) Both are unused items. While the packaging may have some minor scuffs from storage, the contents are in unused condition. Sponge tires can help absorb landing impact depending on how they are used. They are rarely seen in stores nowadays, making them recommended for collection, stocking, or actual racing. We encourage anyone considering Mini 4WD customization to consider these. Thank you.