350pcs Waterproof Solder Seal Sleeve Heat Shrink Butt Wire Connectors Terminals

 Premium Quality: Thick tinned copper and polyolefin tube ensures secure crimping and prevents wiring failures. Providing minimal voltage drop and high current flow. The insulation heat shrink tubing has a dual-wall design. When heated, it will create a solid, insulation, waterproof seal to prevent wire corrosion and provide high tensile strength. Tubing reduces in size and solder will melt and flow through the stripped wires, ensuring strong holding. Your wire will never slip out of the connector.   Non-Slip Wire Contact: Tubing reduces in size and solder will melt and flow through the stripped wires, ensure strong holding. Your wire will never slip out of the connector.   Insulation & Waterproof: Shrink Ratio 3:1. Dual-walled Design, Polyolefin tubing outside and hot melt rings inside effectively improve waterproof performance and prevent wire corrosion.   Easy to Use: An easy one step connection of wires, soldered, insulated and sealed, Fast, efficient, no crimping required