Dermal Anchors Tops and Bases 16g 3mm Spike End 316L Package of 20 Surgical Steel 10 Internally Threaded Tops and 10 Bottoms - 20 Piece Total. Top measures 3mm ,bottom size: 2.0 mm. Base Made of Surgical Steel COMFORTABLE TO WEAR: Well Priced Piercing Set; Comfort Fit Design; Easy to Put on and Won't Easily Slip Off. 100% Customer Satisfaction. We are a U.S. based seller and all our products are shipped from the United States.