Feature: 1. Function: The battery terminal is used to run the power supply safely through the firewall or other panels for easy access to energize accessories. 2. Application: Thru panel battery connector can be widely used in cars, RVs, ships, yachts, cars, agricultural vehicles and other power systems. 3. Installation: The connector is easily installed in a 1‑1/4in hole to provide a battery feed through terminal connection. Can also be indexed using the two flat sides by drilling a 1‑1/8in hole and file fitting the rounded part of the terminal. 4. Stud Size: 3/8in / 10mm brass stud terminals, 5/8in long, where terminals can be stacked up to 1/4in, will bring you more convenience. 5. Securely Mounted: The conduit style metal lock nut can ensure that the feed thru is firmly installed in the toughest conditions. Specification: Item Type: Thru Panel Battery Terminal Material: Rubber + Zinc Alloy + Brass Stud Size: Approx. 10mm / 3/8in, 5/8in/1.59cm long Open Hole Diameter: Approx. 32mm/1.26in Rated Current: 250A Function: Install charging column through the main panel to facilitate quickly using the battery terminal Scope of Application: Cars, RVs, ships, yachts, cars, agricultural vehicles and other power systems. Package List: 2 x Thru Panel Battery Terminal