Description Professional manufacturing, high precision, and good reliability. Made of ABS and zinc alloy material, gold plating process, and high strength for maximum durability, durable in use. Wide application. Suitable for audio subwoofer audio modification. Features -Color:As shown -Material:ABS, zinc alloy -Size:7.50X7.50X4.80cm/2.95X2.95X1.89in -Exterior diameter: 75mm /~3” -Cut Out diameter: 48mm / ~ 1-7/8” -Wall screw hole distance: 43mm/1.69" -Made of zinc alloy and abs material, gold-plated contacts, it is nice for optimal signal transmission. -Sophisticated production, with good performance and with stable quality, anti-aging, heat and corrosion resistance, brings you more convenience. -This speaker box terminal is easy use, it is quick connect and disconnect, easy to install and use. -Make it easy to connect speaker wire to your speaker or subwoofer box due to its binding post terminals. -This speaker junction box connector is suitable for car, ship, home audio-visual subwoofer audio modification. Made of zinc alloy and abs material, gold-plated contacts, it is nice for optimal signal transmission. Sophisticated production, with good performance and with stable quality, anti-aging, heat and corrosion resistance, brings you more convenience. This speaker box terminal is easy use, it is quick connect and disconnect, easy to install and use. Make it easy to connect speaker wire to your speaker or subwoofer box due to its binding post terminals. This speaker junction box connector is suitable for car, ship, home audio-visual subwoofer audio modification.