Package included: 2pcs Speaker Box with 2pcs gaskets and 8pcs screws Dimension: Exterior diameter: 75mm / ~ 3”; Cut Out diameter: 48mm / ~ 1-7/8”; Wall screw hole distance: 43mm Rear side requires Spade Connectors, Mini Spade Connectors or direct soldering of a speaker wire Ideal for DIY speakers and subwoofer boxes NOTE: Rear connections use quick disconnect connectors. Positive (Red) and negative (Black) indicators to ensure proper wiring 3” Double Binding Round Gold Plate Push Spring Loaded Jacks Connector Speaker Box Terminal Cup