1. [Package]: Contains 210 heat shrink connectors in 4 colors, which are convenient for you to check the matching wiring lines. 50 white connectors (AWG 26 - 22), 80 red connectors (AWG 22 - 18), 65 blue connectors (AWG 16 - 14) and 15 yellow connectors (AWG 12 - 10).2.High-quality materialsThe cable connector is made of hot melt adhesive and welding ring. The high-quality heat shrink tubing shrinks at a 3:1 shrinkage ratio when heated and forms a waterproof seal, which can prevent moisture and corrosion of the sealed wires.3.Easy to IdentifyThe transparent design of the cable connector housing allows for visual inspection when inserting wires to ensure a successful connection. Different sizes of welding cable connectors are available in a variety of colors for easy identification. The stacking box with grid ensures that the cable connectors are neatly arranged.4.Easy to UseInsert the frayed part of the cable into the soldering connector. Using a heat gun that produces even heat, the two cables can be securely connected. The cable connector saves time and improves efficiency.5.Widely UsedThe waterproof cable connectors for electrical engineering projects are safe and easy to use, ideal for the automotive, marine, lighting and electronics industries.