This is a 100-meter roll of green-yellow insulated copper wire with a 2.5 mm² conductor cross-section. The color combination green and yellow identifies it as a protective earth (PE) conductor, commonly used for grounding in electrical installations. The wire appears to be a single-core insulated cable, typically classified as H07V-U (solid) or H07V-K (stranded) depending on its internal structure. It is designed for fixed installation inside conduits, distribution boxes, and electrical systems where a dedicated earth connection is required.
eBay