Feature:1. Universal 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.2. Main 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.3. Safe and Easy Use: Battery terminal, is used to easily connect power and ground, provides firm attachment points for installation.4. Premium Material: Thru panel battery terminal connectors are made of high grade nickel plated copper materials to ensure stable performance and long durability.5. Strictly Tested: Thru panel battery terminal has been extensively tested, safe and dependable, will last in the car for a long time.Specification: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.Package List:1 Pair x Thru Panel Battery Terminal ConnectorsNote:Professional installation is recommended