Features: Upgrades your sound effortlessly with 72mm speakers terminals cup toolless spring loaded clamps and oxygenfree copper conductors, ensuring crisps signals transmission and vibrations resistant connection for premium sound quality. precisions for 72mm cutout diameter, this plastic terminals panel integrates color coded binding posts for banana plugs or bare wires, offering secure two channel/ biwiring connectivity home sound systems. for audiophiles and enthusiasts upgrading bookshelf speakers or customs installations, this terminals cup simplifies professional wiring while maintaining signals integrity across amplifiers and speakers cabinets. Perfectly integrates into home theater systems or hifi setups, providing spring clamp connection for surround sound speakers, eliminating screwdriver hassles during installation or cable adjustments behind racks. Engineered with gold plated contacts and antioxidation nickel coating, this terminals block maintains low impedance across 4 5 binding posts, supporting thick gauge speakers cable up to 12AWG for distortionfree sound reproduction. Specifications: Materials: Plastic Diameter: 80mm Opening size: 72mm styles: Pineapple Column, Budweisers Column, Gold Pressing Column, Silver Pressing Column, Crystal Column, 300 Column, Threaded Column, Triangle Column(optional) Package Includes: 1PC Open Hole 72mm Round Junction Box note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.