Bioplast Retainer / Set of 3, these transparent earrings are useful when you want to hide your piercing hole for work, ceremonies, etc. The threaded ball is made of acrylic and the shaft side is bioplast for easy on and off. Since the back is flat disc type, you can choose from a wide range of sizes and lengths to fit your body piercings such as cartilage piercings and mouth piercings.