---＊-----------＊------------＊------------＊------------＊------------＊------------＊------ Thank you for viewing. I strive for a pleasant transaction. Thank you very much! ---＊-----------＊------------＊------------＊------------＊------------＊------------＊------ These are K18 (18-karat gold) earring backs. They are double-lock type backs, said to be less likely to fall off. The silicone resin part is round. Recommended for spare backs! ◆ Compatible with 0.7-0.9mm posts ◆ K18 hallmark present ◆ Double lock, large size, 1 pair #SakuranboJewelry #K18 #18k #EarringBacks Color...Gold系 (Gold-toned) Earring Shape...Catch/Stud Scratches/Discoloration...None