We use the highest grade 316L stainless steel which is a highly durable, recyclable metal. 

• 100% waterproof & sweatproof (shower, pool, ocean, gym)
• Hypoallergenic & lead-free (safe for sensitive skin)
• Tarnish-resistant, long-lasting shine

Material

• 18K Gold Plated
• Stainless Steel
• 5A-grade Cubic Zirconia
  

Dimension

• Outer diameter: 1.35cm
  Inner diameter: 0.85cm