---＊-----------＊------------＊------------＊------------＊------------＊------------＊------ Thank you for viewing. I strive for a pleasant transaction. Thank you very much! ---＊-----------＊------------＊------------＊------------＊------------＊------------＊------ This is a set of two pairs of K18 (18-karat gold) and PT900 (platinum) earring backs. These are double-lock type backs, which are said to be less likely to fall off. The silicone resin part is round. Also recommended as spare backs! ◆ Compatible with 0.7-0.8mm posts ◆ Each has a K18 and PT900 hallmark #CherryJewelry #K18 #18kGold #Platinum #PT900 #EarringBacks Earring Shape...Catch/Stud Scratches/Discoloration...None