The product is produced from roum plating. The inner diameter of the product is 9 mm and the dome thickness is 2 mm. You do not need to have a pierced ear to use the earrings - they are worn at the thinnest part of the ear and left where they are naturally. Since its structure is hard, it is not suitable for opening and narrowing, but the 5 mm gap creates an ideal gap and when worn by paying attention to the ear folds, it fits into the ear very easily. The product is sold individually. Color change is minimized - durability is at a high level. It does not affect pool and sea water. Since it is a hygiene group product, it is not suitable for exchange or return.