?Even higher Copper Core requirements?Contains 102 pure copper-core wires; passing 100% of 5 seconds of DC 10500V high voltage test, easily dealing with currents of 10A and preventing leakage issues from occurring. The nylon wire inside will make it withstand bending thousands of times without breaking or fraying. ?More secure and durable silicone string?Constructed with flexible PVC/PA material that is double-layered and -insulated. The silicone used is non-toxic, environment friendly and meets both the UL and RoSH standards. Using high quality materials ensures that the test leads are durable, flexible as well as having properties like freeze resistance and heat tolerance (-58~328°F). ?Premium test tip and plug? Pure nickel plated copper test lead tips which does not easily break-off, has solid contact traits and speedy and stable measuring reaction times.And the kit will protect it against dust and oxidation. An efficient and stable connection is thus ensured. ?Home & Industry Application?Thanks to the CAT II 1000V / CAT III 1000V / CAT IV 600V ratings 10A currents can safely be tested. Standard 4mm lantern plugs are compatible with all branded multimeters. Recommended for general measurements. ?Quality guarantee?90-Day unconditional refund, one year warranty and 24 hour friendly customer service. All products have the following certifications: CE, UL, RoHS, REACH, IEC/EN:61010-031.