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: blue-A.W.G.: 16~14 Terminal type: male plug + female plug Wire diameter: 1.5-2.5 square millimeters composition: 16-14AWG red male plug connector x50 PCS 16-14AWG red female connector x50 PCS