EASY TO USE - No soldering, no crimping, just a heat gun to complete the junction, more faster and easier than the old method. SOLID CONNECTION - Double wall construction, Polyolefin exterior tubing offers insulation and enhances pullout strength; Hot Melt Adhesive inside guarantees wires are securely linked and wires do not slip from the termination, Which is very secure and waterproof. PRIME SOLDER CONNECTORS - Premium materials are engineered specifically for usage in severe situations. Keep wires safe against abrasion, cutting, scuffing, and low-impact scenarios. Furthermore, sufficient solder melts and flows through the stripped wires to provide a long-lasting connection for your application. GREAT VARIETY SIZES - The package comprises 3:1 heat shrink wire connectors in the following 7 colors: white 80PCS, red 150PCS, green 35PCS, blue 100PCS, yellow 20PCS, Purple 10PCS and Orange 5PCS, which can meet multiple wiring needs (26 - 6AWG). COMMITMENT TO QUALITY - We stand by the quality of our products. Amliber wire soldering kit meet ROHS, ISO 9001:2009, SGS, and CE requirements. If you are dissatisfied with your purchase for any reason, please contact us. 400PCS Heat Shrink Butt Connectors