Trinity Knot Triquetra Celtics RingMaterial : High Grade 316L Stainless Steel Health certification does not contain harmful Elements such as Lead , etc. It is non deformable, hypoallergenic and never rust or corrode High polished on the surface, smooth and comfortable to wear. Jewelry Maintenance: Keep away from water, sweat and cosmetics; Do not wear it in shower, swim, sleep, sport and wash something; Do not exposed to air for a long time, put into sealed bag or box will be better;