ITEM NAME:DIY Home Car Stereo Screw Cup Connectors Subwoofer Plugs 2-Way Speaker Box Description: Material: Durable plastic, copper and gold-plated metal. Size: 80mm/3.14inch, Hole size: 68mm/2.67inch, Screw hole diameter: 4mm/0.15inch. Terminal cup for speaker subwoofer boxes. Gold-plated contacts for optimal signal transfer. Screw type terminals ensure a tight and secure connection. Rear connections use quick disconnect connectors. Positive (Red) and negative (Black) indicators to ensure proper wiring. Specification: Material: Plastic Size: Approx. 8x8x4cm/3.14x3.14x1.57inch Package Includes: 1 Piece Speaker Box Terminal Connector 4 Pieces Screws Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement. SKU: ALU0023812768011190.Rear connections use quick disconnect connectors. Positive (Red) and negative (Black) indicators to ensure proper wiring. Material: Plastic. Size: Approx. 4 Pieces Screws.