Solve your electrical power cable woes with this set of thru panel bulkhead connectors. The set includes one red and one black connector for your positive and ground cables. The 3/8" nickel plated steel terminal posts allow you to properly bolt cables as large as 4/0 AWG to you firewall with enough torque and pass the current to the other side. The connectors will work with panels as thick as 13/32". The solid copper cores allow for up to 550 amps of current to be transmitted, while the glass-filled nylon body eliminates the risk of shorts. The connectors are rated for a maximum of 48 volts and can be used in a variety of applications from car audio to marine and others.