Specifications: Color: Black Material: ABS Base + Copper Terminal Mounting Holes: 2 Base Plate Thickness: Approx. 3mm Screw Holes: Approx. 4mm Wiring Terminal Hole: Approx. 3.8mm Binding Post Diameter: Approx. 12mm Size: Approx. 80 x 80 x 38mm / 3.1 x 3.1 x 1.5in Package Weight: 67 Package List: 1 x Speaker Terminal Box (Speaker is NOT included.) 1 x Screws Kit Perfect Replacement: This terminal box with 2 mounting holes is designed for DIY applications, where a perfect replacement of the original speaker board is required. Easy to Install: The terminal connector is simple installation, it is used to install on the backside of the speaker as an amplifier. It is no need complicated tools required, convenient for using. Premium Material: Pure copper plated wiring terminal, it adopts beautiful and high quality materials, effectively avoid from corrosion and rustiness. Reducing Resonance: The speaker box terminal has 3MM thicken base plate for reducing the resonance of wire box. Wide Applications: Wide compatibility, the speaker box can be used to diameter below 5mm of cable, or Banana head plug, suitable for home, hotel, hall or the other places you want to set a speaker.