Some push pins are bent in advance, if you found the push pin are straight, Pls BEND THE PIN SLIGHTLY following the second photo to learn how to use threadless labret. This threadless push pin labret stud is sold by piece! Including one top and one post. The measurements are approximate! Bar Gauge (thickness): 20 gauge (0.8mm), Bar length : 5mm(SHORT!). AAA Cubic Zirconia Stone Size: 2.5mm. Made of 316L surgical steel, high polished. 316L steel is the most basic metal used in body jewelry. It is the basic requirement of metal to be used in initial piercings and for healing. For most people this grade of steel works just fine. The push in design threadless labret jewelry looks cute as piercing studs. Perfect for various piercings: tragus, cartilage, helix, lip, nose, earlobe, rook, conch or other piercings it can fit. It's a popular choice for gifts among friends and loved ones on birthday or Christmas, Wedding, Mothers Day, Valentines Day,etc. FANSING 2.5mm February Birthstone Threadless Nose Rings 20g 5mm Post Flat Back Earrings Push Pin Surgical Steel Labret Studs for Helix Cartilage Tragus Rook Earlobe Lip Piercings