• Set of 500 solder connectors organized in 5 colors: 50 red, 50 blue, 20 yellow, 40 white, and 340 black. • Heat shrink tubing with 3:1 shrink ratio that forms a waterproof and corrosion-resistant seal. • Fast professional connection without the need for crimping; integrated solder melts automatically when heat is applied. • Transparent design allows for precise visual control to verify that the solder has melted and the seal is complete. • Versatile use ideal for electrical wiring in cars, motorcycles, boats, electronics, and home installations.