Feature: 1. With quick disassembly and assembly design, user can complete disassembly and assembly in 3 seconds, and withhold voltage and power on, lifting power off. 2. This connector is suitable for battery positive pole of 17-19mm, negative pole of 15-17mm. 3. Red is positive and blue is negative, which is easy to identify red and blue covers to prevent the risk of electric shock. 4. This connector can quick disassembly for charging and storage of ship or vehicle battery, which is ideal for installing batteries in small spaces. 5. Bare wire is directly connected, which is often used to connect the battery and the battery wire. Specification: Item Type: Battery Quick Release Connectors Material: Brass, ABS Purpose: Connect the battery and battery cable Anode Size: Approx. 17.5-19.1mm / 0.7-0.8in Negative Electrode Size: Approx. 15.9-17.5mm / 0.6-0.7in Screw Size: Approx. 8mm / 0.3in Anode Aperture: Approx. 17-19mm / 0.67-0.75in Aperture of Negative Electrode: Approx. 15-17mm / 0.59-0.67in Wiring Method: Bare wire directly connected Crimp Specifications: 25-50mm². Package List: 1 x Blue Connectors1 x Red Connectors