We offer discount for large quantity. Welcome to us!2pcs DIY Home Car Stereo 2-Way Speaker Terminal Round Square Spring Cup Connector Terminal Banana Jack Type Connector and Subwoof Plugs Clamp Cup for Subwoofer Speakers. Gold-plated s for optimal signal transfer. Spring clips ensure a tight and secure connection. The rear connections are used to quickly disconnect the connectors. Positive (red) and negative (black) indicators to ensure proper wiring. Easy installation with locking screws and easy to use. Suitable for 4mm banana plugs, spade ends or bare cord. Compact, reliable and . Overall diameter: approx. 93mm x 80mm (3.7 inch x 3.2 inch); Bore diameter: about 66mm (2.6 inch); Top-mount depth: 20mm (0.8 inch)Material: plastic, copper and gold-plated metal. Color: BlackPackage including:2*2pcs DIY Home Car Stereo 2-Way Speaker Terminal Round Square Spring Cup ConnectorNote: Light shooting and different displays may make the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm. About UsWe provide good product with best price, we support wholesale order/