Quality Material: our solid core door bell wire is crafted with the conductor materials of tinned copper and solid copper wire, ensuring efficient and sustained performance under various conditions, the insulation material is PVC, and the outer coating material is also PVC, ensuring safety and adherence; Conductor resistance is 59.4 ohm/ KM20 centigrade, rated temperature is 80 centigrade, rated voltage is 300 voltage; Reference standard: UL758-2021 Color Coded Cores: ease of installation is enhanced with our copper door bell wire, the 22/8 solid are clearly differentiated with colors include white, yellow, red, black, green, orange, blue, and brown; The 22/6 solid are clearly differentiated with colors include white, yellow, red, black, green, orange; The 22/4 solid are clearly differentiated with colors include white, yellow, red, black; The 22/2 solid are clearly differentiated with colors include red, black Enhanced Quality: with our low voltage white solid bell wire, we use f