ITEM NAME: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: 5mm Built in the back of the speaker case for the amplifier and speaker cable box, solid and durable Size: 75mm Opening: 48mm Specification: Material: plastic Size: approx. 75x75x25mm Package Includes: 1Piece Speaker Box Terminal Connector Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. SKU: ALU0035554068008095.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: 75mm Opening: 48mm.