Core material: oxygen-free copper (good conductivity, energy saving). 0.07mm² 0.3 Tinned Copper. 0.12mm² 0.4 Tinned Copper. 0.2mm² 0.5 Tinned Copper. 0.3mm² 0.6 Tinned Copper. 0.5mm² 0.8 Copper.
eBay