1Application: The battery terminal connector has 4 terminals for wiring, designed for various cable connections, mainly used for Sae Jis Type A car rear batteries. 2Low Loss: Tinned copper quick disconnect battery terminals not only provide good conductivity, but also reduce voltage distortion and transmission loss. 3Size Details: Product inner diameter is 16?18mm/0.62?0.7in, positive inner diameter is 17.5 mm/0.69 in, negative inner diameter is 16 mm/0.63 in. 4Correct Connection: Battery terminal connector is suitable for cars, vans, caravans, trucks, etc. Just make sure to connect the correct terminals for the correct polarity. 5Easy to Install: Equipped with the wrench, easy to install, the wiring is easy to modify and the connection is firm, press the lever to fix the battery on the battery post.