The Classic is a U shaped Hoop doubled. This classic Hoop can be used to updated your ear stack as well as for adding charms. Stainless steel Strong. Hinge for easy and comfortable fit. Hallow for light weight Strong for your ear stacks and sits flat front to back. Stainless steel. 14K gold PVD plated. Click Closure for a seamless fit. Waterproof Hypoallergenic.