What is this?Our electrical wire terminals kit is made of premium PE material, sturdy and long-lasting, easy to connect electrical wires; it has excellent sealing performance and waterproof performance.Our heat shrink butt wire connectors are widely applicable on motorcycles, cars, household appliances, yachts, RVs, distribution boxes and so on. What will I get?Length:White: 26mm/1.02inch, Red: 40mm/1.57inch, Blue: 40mm/1.57inch, Yellow: 40mm/1.57inchConductor Range:White: 26-40AWG, red :22-18AWG, blue: 16-14AWG, Yellow: 12-10AWGPackaging includes: 400xSolder Seal Wire Connectors (100x White +100x Red +100x Blue +100x Yellow) Are there any advantages of the product?Use exclusive material in the solder connectors to avoid shrink tubing melting before solder.Tubing reduces in size, the enough solder will melt and flow through the stripped wires, ensure a long lasting connection for your application. How to use it?Wire connectors can be connected with just a heat gun, no crimping tool or soldering machine is needed. What should I notice?Our heat shrink tubing is resistant to high temperatures; The minimum shrinkage temperature is 80°C(176°F), the solder starting melting temperature: 111°C(231.8°F), the solder complete melting temperature: 138°C(280.4°F); with excellent performance, you can use it with confidence.