Carwires PDB300 3-Way Power Distribution Block Power/Ground Wire Distribution Block 3-Way Connection, Ideal for Multi Car Amp Systems (1) Input: Accepts 1/0 or 4-Gauge Wire (3) Outputs: Accepts 4 or 8-Gauge Wire Screw-down Wire Clamps Impact Resistant Snap-on Plastic Cover 100% Solid Brass Construction Platinum-Plated for Corrosion Resistance Note: For your vehicle's protection, an inline fuse holder between the distribution block and your vehicle's battery is required. Power/Ground Distribution Block Input: Accepts 1/0 or 4-Gauge Wire Outputs: Accepts 4 or 8-Gauge Wire Screw-down Wire Clamps Impact Resistant Snap-on Plastic Cover 100% Solid Brass Construction Platinum-Plated for Corrosion Resistance