You simply can't go wrong with Gorilla Glass jewelry. It's guaranteed to be comfortable, stylish and top notch quality. These single flared Bullet Holes are made of high quality glass and are available in three, new colors to make your stretched piercing really stand out. Glass is hypoallergenic, super smooth and very easy to clean. It can be autoclaved, making it a very suitable material for troublesome or initial piercings as well. Single flared, so super easy to insert into your piercings. Comes with one silicone o-ring to keep the jewelry in place.