[Installation function]These handy connectors allow you to route the battery cable through the firewall the . Connectors are used to easily connect power and ground. Conduit style metal lock nut ensures safe installation in the harshest conditions. Copper Core SAE Max Amperage:: 550amp 12vdc (6.6kw) Copper Core Metric Max Amperage:: 450amp 12vdc (5.4kw) Max Voltage: 48 Note: Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: B:black Material: nickel plating + nylon PA66 Package Contents: 1 x Bulkhead Cable Connector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.