Feature 1Universal Application: The kit includes a red and black connector for connecting the positive cable to the earth cable. Thru panel battery connector is suitable for a variety of applications from car audio to marine. 2Main Function: 3/8 inch nickel plated copper terminals allow you to properly secure cables as large as 4/0AWG to your firewall with sufficient torque to pass current to the other side. 3Safe and Easy Use: Battery terminal, is used to easily connect power and ground, provides firm attachment points for installation. 4Premium Material: Thru panel battery terminal connectors are made of high grade nickel plated copper materials to ensure stable performance and long durability. 5Strictly Tested: Thru panel battery terminal has been extensively tested, safe and dependable, will last in the car for a long time.Item Type: Thru Panel Battery Terminal ConnectorsMaterial: Nickel plated copperOperating Voltage: DC 12V to 48VRated Current: 440AInstantaneous Current: 550ANumber: Pair (red positive + black negative)Cross Sectional Diameter of Terminal Post: 3/8 inchTerminal Post Length: 1 inch at both endsDiameter of Opening: Approx.32mm/1.3inApplication: Nickel plated copper posts allow you to properly secure cables as large as 4/0AWG to your firewall with sufficient torque to pass current to the other sideFitment:For a wide range of applications from car audio to marine .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 Pair x Thru Panel Battery Terminal ConnectorsNoteProfessional installation is recommended