2022 New Heavy Duty Remote Battery Power Junction Connector 3/8 Stud Post Terminal Kit for Car camping RV Truck Boat tool Accessories Specification Mounting hole size: 1.25 inches. Stud: 3/8 . color red/black. Material copper + plastic. Be applicable For safely running power through firewalls or other panels with easy access to accessories. Installation Notes A 1-1/4 hole is required for easy installation. Installation function These handy connectors allow you to route the battery cable through the firewall the right way. Use heavy duty 3/8 x 16 (9.525mmx1.5) brass terminals. Batteries that easily fit in 1-1/4 holes, provide active isolation via terminal connections. Connectors are used to easily connect power and ground. Conduit style metal lock nut ensures safe installation in the harshest conditions. Package Contents 1*Red bulkhead cable connector, 100% new high quality. 1*Black bulkhead cable connector, 100% new high quality. 1*Red+1*Black Bulkhead Cable Connector, 100% Brand New High Quality. After-sales instructions All dimensions are measured by hand and may vary slightly. Due to differences in different monitors, the pictures may not reflect the actual color of the item.