1. Using thick copper inner core, large load capacity, low resistivity, good conductivity, stable and reliable wiring. 2. The outer layer is tin-plated and is resistant to oxidation, which can prevent the copper core from being exposed to the air for a long time to form patina and maintain strong electrical conductivity. 3. The shell adopts high insulation protection, and the terminal shell adopts thickened insulating flame-retardant casing for effective protection. 4. The inner core ring has a notch design, which is suitable for the insertion tension of the bullet male head to expand outwards, and the hollow slot inside will be firmly stuck when the bullet head is inserted. 5. Suitable for automotive terminals, audio isolation switches, machines, home decoration, and many other applications. 6. Parameters: Material: Copper+PVC Wire gauge: red-A.W.G.: 22~16; blue-A.W.G.: 16~14; yellow-A.W.G.: 12~10 Terminal type: male plug + female plug Wire diameter: 22-16AWG red male and female butt connectors: 0.5-1.5 square millimeters 16-14AWG blue male and female butt connectors: 1.5-2.5 square millimeters 12-10AWG yellow male and female butt connectors: 4-6 square millimeters composition: 22-16AWG red male plug connector x 45 PCS 22-16AWG red female connector x 45 PCS 16-14AWG blue male plug connector x 45 PCS 16-14AWG blue female connector x 45 PCS 12-10AWG yellow male plug connector x 32 PCS 12-10AWG yellow female connector x 32 PCS