Niobium is a naturally occurring element (41 on the periodic table) and is hypo-allergenic. It is a grey color in it's natural state, but can be anodized in a wide array of colors. When anodized, no color is actually added. An electrical current passed through it produces an oxide layer that reflects light and lets you see color.
|Actual wire diameter||.040", 1mm|
|Wire gauge||19 (SWG)|
|Actual ID inches||.160"|
|Actual ID mm||4.07|
|Approx rings per oz||276|