Welding Accessories features: This is a set of solder seal wire connectors, made of high-quality materials, with long-term durability, and can serve you well. The solder seal wire connector is solderless and crimpless, which can save much of your time when you are using it for your project. Besides, you can also use them in hard to reach or limited space environments easily. Features Color: Assorted Material: Polyolefin, tin Size: About 4.00X0.70X0.70cm/1.57X0.28X0.28inch Working temperature: -55~125 Full shrinkage temperature: 130 Solder melting temperature: 125 Full melting temperature of solder: 150 Shrinkage ratio: 2:1 Color-coded tubing makes it easy to identify the right size of the connector for every application Don't need to crimp, and the insulation tubing will shrink down, shrinking ratio: 2:1, creating a waterproof seal These solder seal wire connectors are commonly preferred in automotive sector as well as marine sector These practical connectors can also used for vehicle, home or scientific wiring projects You will receive 150pcs solder seal wire connectors, which are good quality and low price.