Features: This terminal board was designed for custom applications, where a replacement of the original speaker board is required. Simply press down the terminals and insert speaker wire for direct contact. Rear side requires Spade Connectors, Mini Spade Connectors or direct soldering of a speaker wire Suitable for using at home, in hotel, hall or the other places you want to set a speaker. Easy to mount with 4 mounting holes. Specification: Material: Plastic + Metal Thread Hole Diameter: 4 mm Board Size: approx. 90 X 90 X 25 mm/3.54 X 3.54 X 0.98 in Inner Circle Diameter: 63 mm Weight: approx. 42 g Included: 1 X Speaker Wiring Terminal Cup This terminal board was designed for custom applications, where a replacement of the original speaker board is required. Simply press down the terminals and insert speaker wire for direct contact. Rear side requires Spade Connectors, Mini Spade Connectors or direct soldering of a speaker wire Suitable for using at home, in hotel, hall or the other places you want to set a speaker. Easy to mount with 4 mounting holes.