3:1 Heatshrink Ratio: The heat shrink butt connector has dual-wall shrinking tube and inside hot melt glue, providing a fully safe seal and wire corrosion. Its dual wall insulation seals against moisture corrosion, air leakage, and can be used underground

Premium Copper Core: The butt splice terminals use seamless and high-quality thick copper tubular, which makes the connection project safer! Fix the wire firmly, increase current flow, and decrease voltage drop

Wide Usage: Our heat shrink wire connector is ideal for marine, automobile, industry, electrical and electronics. Whether working on boat, vehicle, RC car, home, scientific project, car stereo, or electrical DIY, the crimp connectors will work wellPackage Included: 50 pcs red waterproof wiring connectors for 22, 20, 18, 16 gauge wires, 40 pcs blue waterproof wiring connectors for 16, 14 gauge wires, 10 pcs yellow waterproof wiring connectors for 12, 10 gauge wires—total 100 pcs