This refers to "solid wire" filler metal used in precision laser welding and additive manufacturing. It is sold by material type (stainless steel, gold, titanium) rather than length alone.

: You can find various kits and individual components at Ellumiglow and select listings on Amazon . 2. Laser Welding Wire (Industrial & Jewelry)

Bench Jeweler: Library: Articles: Solder vs. Laser Wire - Stuller