350Pcs mixed solder sleeve heat shrink butt wire splice terminal connectors, an easy one step connection of wires, soldered, insulated and sealed. Features: An easy one step connection of wires, soldered, insulated and sealed. Quick, efficient, no crimping required. Solder and seal and with advanced waterproof function. Transparent heat shrink sleeve allows for accurate visual inspection. Greater pull strength. Used in electronics, railway, marine, automobile, motorcycle, aerospace and other outdoor applications. Storage in a plastic case for easy access. Specifications: Material: Polyethylene Working Temperature: -55~125 Start Shrinkage Temperature: 80 Solder Start Melting Temperature: 138 Solder Full Melting Temperature: 160 Shrinkage Temperature: 160 Dielectrical Strength: 1kv Protection Level: IP67 Package Weight: 110g / 3.88ounces Package Size: 210 * 110 * 30mm / 8.27 * 4.33 * 1.18in Packing List: 35 * Blue Wire Connectors 15 * Yellow Wire Connectors 25 * White Wire Connectors 35 * Red Wire Connectors 240 * Black Wire Connectors 1 * Storage Box