See it transparently, you can clearly see whether the wiring is in place, which is convenient for users to investigate. Environmentally friendly flame retardant PA insulation material, long life, corrosion resistance, aging resistance, high temperature resistance. There is a test hole on the top of the product, which can be tested with an electric pen.. Electrolytic copper, tin-plated surface can prevent copper oxide from oxidizing and maintain good electrical conductivity. With the high-quality materials,It's comfortable to use., Manufacturer: SOYWIM