These 4 port black insulated connectors are designed for 2/0 to 14 AWG wires, making them suitable for a wide range of electrical applications. Each dual-entry connector uses a 3/16 in. Allen hex screw to securely fix wires in place and allows easy reinsertion for inspection and maintenance. The connectors are insulated with high dielectric strength plastic, offering excellent resistance to chemicals and wear. Ports are pre-filled with a lubricating oil that has antioxidant properties, helping to prevent corrosion and ensure long-term conductivity. These aluminum wire connectors are a safer and more convenient alternative to butterfly nut connectors, supporting higher current loads and a broader range of wire diameters. They support multiple connection options, including aluminum-to-aluminum, copper-to-copper, and copper-to-aluminum, making them ideal for safely splicing different wire types. Designed with high security in mind, these connectors help prevent issues caused by overheating in mixed-metal wiring, ensuring reliable performance in both residential and commercial electrical systems. Each pack includes 6 connectors, providing a practical solution for multi-wire connections while maintaining safety and efficiency.