Package including -- 12pcs lip piercing bar (each size comes 2pcs), 24pcs replacement balls (each size comes 4pcs) Material -- Hypoallergenic and nickel free surgical stainless steel, allergy free and anti-rust, suitable for sensitive body Size -- 16 gauge (1.2mm), bar length: 4mm, 5mm, 6mm (1/4"), 8mm (5/16"), 10mm (3/8"), 12mm (1/4"), replacement ball size: 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm Using -- This earrings piercing set good for lip rings, labret studs, tragus piercing, cartilage earrings studs, helix piercing, etc. Feature -- High polished smooth surface metal is very comfortable and prevents damage and irritation to your piercings