Hello welcome to our shopStylish Design, 100% Brand New, High Qualitydescribe :Package Included:1 ringColor: as picturedSize: Male inner diameter 18mm adjustable opening Female: inner diameter 16mm opening adjustable1 inch = 2.54 cmMaterial: aluminum alloyOccasion: Party, Birthday, Holiday, Show, Shopping.notes:Jewelry Care:(1) Avoid wearing the same piece of jewelry for a long time, especially in hot summer, jewelry is easily corroded by contact with sweat.(2) Avoid damp or acid-base environmentally friendly jewelry, clean jewelry from time to time, and use a soft-bristled toothbrush to clean its surface.(3) Jewelry should be stored in a separate lattice jewelry box to avoid overlapping jewelry. Put a desiccant in the jewelry box to prevent moisture.(4) Before bathing or swimming, remember to take off your jewelry.Tip:1) Slight chromatic aberration is normal due to the difference in light.2) Due to manual measurement, please allow 1-3cm size difference.3) If there is a problem with the product, please leave a message before giving bad feedback.