The item is 6pcs professional and practical 2-way round spring loaded speaker terminal connectors, which are mainly made of plastic and gold-plated metal, and designed for DIY speakers and subwoofers. Gold-plated contacts for optimal signal transfer and spring-loaded terminals ensure a tight and secure connection. It is easy to install with locking screws and convenient to use. 6pcs round spring loaded speaker terminal connectors in one set will be sold together. Cut-out Diameter: Approx. 45mm (1 7/8 inch); Total Diameter: Approx. 75mm (3 inch); Top Depth: 20mm (7/8 inch). 100% brand new and high quality 2-way speaker box terminal connector. Terminal cup for speakers and subwoofers. Rear connections use disconnect connectors. Positive (red) and negative (black) indicators to ensure correct wiring. Fits 4mm banana plugs, spade terminals or. Compact, reliable and. Color: as shown Material: plastic + metal Package Contents: 6 x 2-way Speaker Box Terminal Binding Post Only the above