Dermal Anchors Tops and Bases 16g 4 mm Clear CZ 316L Package of 11 Surgical Steel 11 Tops and 11 Bottoms - 22 Piece Total. Tops measure 4mm bottoms size: 2.0 mm. Base Made of Surgical Steel Features Press-Fit 4mm gem COMFORTABLE TO WEAR: Well Priced Piercing Set; With Expensive Looking; Comfort Fit Design; Easy to Put on and Won't Easy to Slip Off. Cute and Stylish Design, Firm and Easy to Use. Adopted Simple Design, Smooth Surface.