Bioflex is flexible, and is safe even for initial piercings. It is very easy to take in and out and is great for those that have sensitivities to other metals and the best part of all: it's comfortable! The top of the screw is 14KT Solid White Gold. The bioplastic is not seen at all. It gives the impression that it is a complete solid white gold screw but gives the comfort of Bioflex!!