Deco Parts - Bulk Sale The backs are flat, but as these are imported products, there may be unevenness or small scratches. I inspect them and try to remove any chipped items as much as possible. Also, some surfaces are sticky due to the material. Thank you for your understanding. I think you can use them for iPhone case decoration, handmade crafts, nails, etc. ◎ For those who purchase multiple items, we offer a combined discount, so please let me know in the comments ⭐︎