Features:Thisterminal box with 2 mounting holes is designed for DIY applications, where areplacement of the original speaker board is required.Simpleinstallation, 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 fromcorrosion and rustiness.3.8MMthicken base plate for reducing the resonance of wire box.Widecompatibility, 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:BlackMaterial:ABS Thickened, Copper TerminalMountingHoles: 2BasePlate Thickness: Approx. 3.8mmScrewHoles: Approx. 4mmBindingPost Diameter: Approx. 9.5mmSize:Approx. 57 x 57 x 26mm / 2.2 x 2.2 x 1.0inPackageWeight: 39gPackageList:1 xSpeaker Terminal Box (Speaker is NOT included.)1 xScrews Kit.