This terminal board was designed for custom applications, where a replacement of the original speaker board is required. Simply 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 , in hotel, hall or the other places you want to set a speaker. Easy to mout with 4 mounting holes. Product Name : Binding Post Terminal Board Connector Type : Screw Type Binding Post Color : Black & Red Plate Color : Black Material : Plastic & Metal Screw Hole Diameter : 4mm/ 0.16" Plate Size : 9.2 x 7.9 x 3.7cm/ 3.6" x 3.1" x 1.5" (L*W*T) Net Weight : 117g Package Content: 2 x Binding Post Terminal Board Note:Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.