The features of the Haisstronica solder seal connector include: 1. Weatherproof solutions. 2. Premium solder seal ring. 3. Abrasion resistance and environmental protection heat shrinkable tube. 4. All-in-one step:easy to use with a heat gun,perfect for both DIY projects and professional use. 5. Wide Applications:120PCS Solder Seal Wire Connectors Includes White AWG26-24 25pcs/Red AWG22-18 45pcs/Blue AWG16-14 40pcs/Yellow AWG12-10 10pcs,thus can be widely used in automotive, motorcycle,and marine. Overall, Haisstronica solder connectors offer a reliable, easy-to-use, and versatile solution for electrical connections, making them a popular choice for both professionals and DIY enthusiasts alike. Haisstronica solder seal wire connectors hot melt adhesive systems provide the right amount of adhesive,which cools,hardens,and reaches its bond strength within seconds,ensuring a weatherproof and long-lasting bond for your application. With enough solder wrapping the wire to melt and flow,marine grade wire connectors forming a seal,which ensures long-lasting connections,especially for larger one. Specifically designed for use in harsh environments,the heat shrink creates cable entry seals,which offers environmental sealing protection and protects the wires and cables from abrasion,cutting,scuffing and low impact. One and Only:Uniquely marked with wire gauges on the polyolefin tubing,Haisstronica's butt connectors are designed for easy identification and quick selection of the appropriate connector. QUALITY COMMITMENT:We stand behind the quality of our products. If for any reason you are not satisfied with your purchase,please contact us.