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 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 inch Plate Size : 9.2 x 7.9 x 3.7cm/ 3.6 inch x 3.1 inch x 1.5 inch (L*W*T) Net Weight : 117g Package Content: 4 x Binding Post Terminal Board Only the above package content, other products are not included. Note: Light shooting 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.