Features: High-quality material: Made of high-quality material, wear-resistant and corrosion-resistant, not easy to break, can be used for a long time, durable. Waterproof, Insulated: Its double-wall design ensures perfect insulation and waterproof performance, prevent wires from corroding even in wet environments. HIGH PERFORMANCE: The hot-melt property of the internal solder ensures strong tensile strength and tear resistance. When heated, the solder melting, holding the wire securely and never slipping out of the connector. Easy to use: No need to crimp, just put the stripped wire into the solder sleeve and heat evenly to complete the connection WIDE APPLICATIONS: Our solder wires connectors are perfect for your boat, vehicle, airplane, home or even science projects, ensuring safe and weatherproof soldering! Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Connector Operating Temperature: -55°C - 125°C (-122°F - 290°F) Minimum shrinkage temperature: 80°C (180°F) Minimum soldering temperature: 138°C (300°F) Specification: White 25PCS/Red 35PCS/Blue 30PCS/ Yellow 10PCS/ Black casing 300PCS Package List: 400pcs x Heat Shrink Tube Sleeves Kit