Material: 316L Stainless Steel, Hypoallergenic Color : Black Size : 3/4/5/6/7/8/9/10/12/14/16 mm (Diameter), 10mm (Total Length), 1mm (Pin Thickness) These illusion fake plugs earrings are very easy to use just unscrew the end off and you put it thru your lobe and screw the end back on to complete the insertion