Black Niobium Seam RingShiny Black niobium seam ring Niobium is made black through a heating process, it is not coated. Most people with metal allergies can safely wear niobium. Highly resistant to corrosion and is used in medical implants. Niobium is nickel and lead free. Excellent alternative to black, coated jewelry. Sold as a single item

5mm in diameter and 3

Overall size: 5x9mm

5mm round gem

Single jump ring

Seam ring made out of commercially pure titanium

Internally Threaded

Overall Size: 8x3mm

Shiny Black in color or High-Polish

5mm or 2mm gems

7mm wide x 5

Sold as single item

Anodized and sandblasted for matte texture