Good quality tinned copper wire, flexible and thick silicone insulation: real copper (tinned) conductor. 20AWG 0.5mm² 6 colors（6 meters per piece） tinned copper wire is composed of 100 strands of 0.08mm thick, twisted together, making it very flexible. Silicone insulation is wide（temperature range from -60°C to 200°C), has extremely high strength and effectively prevents short circuits or interruptions Practical Distribution Box:Variety of wire colors. - The wires are contained in a convenient box with a distribution hole for each color, which is durable and keeps the wire spools well organized, easy to use and, most importantly, free of annoying tangles Good assortment of wires for your toolbox: The e-wire kit also includes 6 different color spools, shrink sleeve kits, mini wire strippers and colored wires, which can be used for other daily projects Easy to Use:For hobbyists, RC airplanes, RC vehicles, model boats, batteries, lamps, electrical appliances, electric heaters, measuring tools, tools, motor cables, digital 3D printer fields, test cables, RC applications. Silicone coating Satisfaction Guarantee: If you find any defect or fault in this connecting cable assortment kit, please contact us, we will give you a satisfactory solution within 24 hours