This is a set of clear card cases and mask design stickers. Each set includes 10 cases and 10 stickers. You can use the balaclava stickers to cover the face on your driver's license or My Number card. I made a mistake when ordering and have a lot left over, so I'm selling them. ■How to use■ Place the sticker over the clear case, aligning it with the face photo. Please refer to the product images for details. *Please be careful not to stick the stickers directly onto your driver's license, etc. *The card cases are made of a soft material and may be slightly warped. If you are concerned, please purchase a clear case from a 100-yen shop or similar. I am listing only the number of items in stock, so if you need multiple sets, please request a combined order. *Please note that you cannot change the quantity after purchase.