Features: The battery poles adapter can reduce voltages distortion and transmission loss, and is the best substitute for damaged terminal connector. It can be used to connect vehicle batteries and maintain good working condition. The battery terminal connector is made of high-quality brass material, which has strong conductivity, better corrosion resistance, durability, and is suitable for long-term use. The internal thread is 8mm and the external thread is 6mm. Even if you are a beginner, you can easily install and connect the battery column adapter without the need for other tool, saving you time. The packaging includes 1 pair of battery sound column adapters, 2 stainless steel screws, 2 washers, and 2 elastic pads. They are very suitable for replacing worn and corroded battery poles adapters. Our battery poles adapter is widely used in 6mm threaded batteries for automobiles, cars, ships, campers, and more., and is a practical tool for improving battery performances. Please ensure that they are suitable for your battery before purchasing. Specifications: Material: Brass Type:External 6mm Internal 6mm,External 6mm Internal 8mm,External 8mm Internal 8mm,External 3mm Internal 8mm Package Includes: 1Pair Battery poles Adapter 2Pcs Stainless Steel Screws 2Pcs Washers 2Pcs Elastic Pads note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.