Features: 1.Characteristic: Pure copper terminal, high efficiency, artificial resin insulation material, safety, high performance, the inner diameter of M8 battery terminal is 16?18mm/0.63?0.71in. 2.Application: Battery terminal is widely used in the separation and distribution of welding machines, charging generators, ships, RVs, trucks, automobiles, and solar cells. 3.Positive Negative Terminal: The kit includes 2pcs (black and red) battery connectors, black terminal connects to the negative pole of the battery, red terminal connects to the positive pole of the battery. 4.Easy Operation: The installation is simple, flexible tightening of the connector, no need to worry about loosening the bolt from the bolt. 5.High Reliability: With elaborate manufacturing technology, has high reliability and stable performance. Specification: Item Type: Car Battery Terminal Material: Brass+Copper Inner Diameter: Approx. 16-18mm/0.63-0.71in Applicable Models: Universal