Features: This terminal box with 2 mounting holes is designed for DIY applications, where a replacement of the original speaker board is required. Simple installation, it is used to install on the backside of the speaker as an amplifier. Just press down the terminals and insert speaker wire for direct contact. Copper wiring terminal, beautiful and high quality, effectively avoid from corrosion and rustiness. 3.8MM thicken base plate for reducing the resonance of wire box. Wide compatibility, can be used to diameter below 5mm of cable, suitable for home, hotel, hall or the other places you want to set a speaker. Specifications: Color: Black Material: ABS Thickened, Copper Terminal Mounting Holes: 2 Base Plate Thickness: Approx. 3.8mm Screw Holes: Approx. 4mm Binding Post Diameter: Approx. 9.5mm Size: Approx. 57 x 57 x 26mm / 2.2 x 2.2 x 1.0in Package Weight: 39g Package List: 1 x Speaker Terminal Box (Speaker is NOT included.) 1 x Screws Kit