Features: 1.Whether in ships, vehicles, homes or scientific projects, heat shrinkable solder and sealed connectors will ensure solid welding, increase current flow and waterproof connections. 2.Melted solder ensures that the wire is firmly connected and prevents the wire from slipping out of the terminal. 3.High?quality wire connectors for sealing, strain relief, cable inspection and insulation. 4.Shrink ratio is 2:1, simple one?step wiring connection. Made of high?quality plastic, durable and long service life. 5.It is easier to choose the correct heat shrink connector, and the different color?coded tubes with wire gauge markings, and can be easily identified. Specification: Item Type: Solder Seal Wire Connector Material: Plastic Standard: 1 Kit White Connector (25PCS) Red Connector (35PCS) Blue Connector (30PCS) Yellow Connector (10PCS) Operating Temperature: -55 - 125 (-67 - 256) Minimum Shrinkage Temperature: 80(176) Minimum Temperature for Solder Melting: 138 (280.4) Shrinkage Ratio 2:1 Red Connector Diameter: Approx. 2.7mm/0.10in Blue Connector Diameter: Approx. 4.5mm/0.18in White Connector Diameter: Approx. 1.7mm/0.07in Yellow Connector Diameter: Approx. 6.0mm/0.24in Red Connector Cable Cross-Section: 0.5 - 1.0mm2 Blue Connector Cable Cross-Section: 1.5 - 2.5mm2 White Connector Cable Cross-Section: 0.25 - 0.34mm2 Yellow Connector Cable Cross-Section: 4.0 - 6.0mm2 Application: Whether you are working on your boat, vehicle, home or scientific project, our heat shrink solder and seal connectors will ensure solid soldering, increased current flow and weatherproof connections every time