Description: Hyaline removable plastic protective shell Sand nickel-plated material, High-cla conductivityFits the Cars, Boats, RVs and other for Power Splitting. Fit up to the following wire size: 1X 4AWG and 4X 8AWG. Application: Suitable for sub circuit of automobile, RV, ship, etc., often used in audio modification. Specifications:Item name: 4-Way Power Distribution BlockMaterial: Zinc-plated nickel pearl Input/Output: 1 in - 4 out Suitable wire diameter size: 1*4AWG and 4*8AWG Input connection hole diameter: 9.5mm Output connection hole diameter: 5.5mm Mounting hole (screw hole) : M4 Installation hole spacing: 6.1cm Note:- There might be little error of size for manual measurement.- The colors deviation might differ due to different monitor settings, please kindly understand.Packing list Package includes: 1 x 4-Way Power Distribution Block