• For 16-14 AWG Wire: Color-coded blue for immediate identification, these connectors are manufactured to ensure a secure and lasting crimp on common 16 to 14 AWG wires. • IP67 Waterproof Seal: The tubing features a heat-activated adhesive liner that melts and flows to create a complete seal, providing waterproof protection against moisture, saltwater, and corrosion while adding superior strain relief. • Allows Visual Inspection: A crystal-clear polyolefin sleeve offers full transparency for visually confirming proper wire placement and achieving a perfect crimp before heat is applied, eliminating installation errors. • Fully Insulated Safe Connection: The connector's design fully insulates the mated connection, preventing accidental shorts and protecting against abrasion, vibration, and contaminants for maximum safety and durability.