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.

Depending on whether you are looking for or industrial welding materials , "laser wire" refers to two very different products. 1. Laser Wire® for Lighting (Accent & Decorative)

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