Product details- 1. Mostly 316L stainless steel jewellery with 18k pvd gold plating. 2. 304 stainless steel 18k gold electroplated. 3. water-proof, sweat proof, hypoallergenic, anti-tarnish, 1 year polish stay. With PVD coating a metal-ceramic surface is forming that greatly improves the appearance, durability and will get you scratch resistant pieces which are hypoallergenic, last longer than other forms of plating and are easy to maintain and clean with soapy water.