Metal: 14k solid gold, Not Plated or Gold Filled Available Gold color: Yellow gold Stone: Natural Black Onyx / garnet Thickness: 0.82mm (20G) , 1.0mm (18G), 1.2mm (16G) Stamp: 14k on top or 14k gold back, no stamp on titanium back, ★Threadless Push Pin (Flat Back) ★ We have two different materials of Push back for you choose: ● One is 14k solid gold with length : 6mm(standard), 8mm, 10mm (long) ● Another is implanted grade titanium push back in size 5mm(short) 6mm 8mm and 10mm(long) ● Flat back is very comfortable to wear it 7/24, especially for for a side sleeper. ★ If you need additional push back in different thickness like 18g or 16g, you can find them here, https://www.etsy.com/ca/LeiTjewelry/listing/1490980813/14k-solid-gold-push-pin-labret-titanium?utm_source=Copy&utm_medium=Lis