【DISTRIBUTION BLOCK】High quality car audio amp power /Ground distribution block, offers complete protection for your car audio system | 【EASY TO INSTALL】Universal copper car audio power distribution block, screw-down wire clamps. If there is a problem with the product, 90 days replacement | 【SUPER DURABLE】Solid brass with plating for corrosion resistance, snap-in Industrial-grade Plastic Cover. Ensures you get the longevity out of your system that you expect | 【WIDELY USED】4 Way Connection. Input: Accepts 0GA(1GA)*1,Outputs: Accepts 4GA*4 Wire. Applicable to auto,RV, boat or other vehicles, protect your audio system.