You will find 3 files: left, right and septum piercing. All items are in the nose piercing category, septum piercing is in the left nose piercing category. I also recommend downloading the Tidy Accessory mod by Sparrow. It helps to separate CAS categories. Check it out.

You can find matching multiple earrings set by clicking on the picture below. If you want to download other types of nose piercing, check out my star, camellia and heart piercings.