These dark hematite jump rings are 10mm with a thickness of 1.2mm (about 16 gauge). They work well with black chain and findings. They are made of stainless steel heavily plated in hematite / black. They are unsoldered but will arrive in the closed position. Non-tarnish and hypoallergenic. Outside diameter when closed
4mm Hematite / Black Stainless Jump Rings, 4x0.7mm, 2.6mm Inside
Products - Jewelry Tool Box
Otros, Tabacofilia, Coleccionismo - PicClick ES
3mm Hematite / Black Stainless Jump Rings, 3x0.6mm, 1.8mm Inside
6mm Hematite / Black Stainless Jump Rings, 6x1.0mm, 4mm Inside
Jewelry Clasps & Hooks, Jewelry Findings, Beads & Jewelry Making
6mm Hematite / Black Stainless Jump Rings, 6x1.0mm, 4mm Inside
Jewelry Clasps & Hooks, Jewelry Findings, Beads & Jewelry Making
Black / Hematite Stainless Steel Jump Rings - Jewelry Tool Box