ITEM NAME:2 Pieces Speaker Box Terminal Round Spring Cup Connector Subwoofer Enclosure Description: Name: Speaker 2 Way Terminal Box Cylinder Material: pure copper plated;Solder pad material: iron plated copper Screw hole diameter: 4mm Built in the back of the speaker case for the amplifier and speaker cable box, solid and durable Size: 65mm Opening: 54mm Specification: Material: plastic Size: approx. 65x65x25mm Package Includes: 2 Pieces Speaker Box Terminal Connector Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. SKU: DMO0017092219445034.Built in the back of the speaker case for the amplifier and speaker cable box, solid and durable. Cylinder Material: pure copper plated;Solder pad material: iron plated copper. Size: 65mm Opening: 54mm.