Features: 1.Wide Application: The connector is suitable for use in power supply systems for cars, caravans, boats, yachts, racing cars, agricultural vehicles, etc. 2.Advantages: Large cables that pass through holes are prone to friction even with protective sleeves. Battery terminal connector eliminate friction and provide excellent strain relief for the cable. 3.Stable Performance: Durable brass stud terminals eliminate short circuit problems. And the connector use to run power safely through a firewall or other panel. 4.Material: This connector is made of rubber and zinc alloy and brass, strong and rustproof, high strength, stable and reliable performance. 5.Safe Installation: Battery cable terminal connector can ensure that the feed thru is securely mounted in the toughest conditions. Specification: Item Type: Battery Terminal Connector Material: Rubber and zinc alloy and brass Stud Size: Approx: 10MM/0.39in Opening Diameter : Approx: 32MM/1.25in Rated Current : 250A Function: Install charging column through the main panel, convenient and quick use of battery terminals Application: Motor vehicles, motor homes, ships, yachts, racing cars, agricultural vehicles and other power systems Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.