classic skull 4mm6mm9mm double g ring men and women fashion ring, Silver

titanium steel, also known as titanium alloy/316l stainless steel, is more expensive than ordinary stainless steel. titanium steel is more expensive than ordinary stainless steel. pass the artificial sweat test, pass the artificial sweat test, it is an environmentally friendly material that will not cause side effects and harm to the human body. it is very suitable for making jewelry that comes into contact with human skin. titanium steel jewelry is made of the same material from the inside to the outside. its characteristics are: high hardness, corrosion resistance, acid and alkali resistance, no discoloration, no fading, and no allergies..syi