Feature: Material: ABS, cold rolled steel Size: overall size 109*109MM (length*width), distance between the center points of diagonal screw holes 114MM, inner diameter of plastic frame 80MM Specification: Color:black Package content: 2*Speaker Grill Mesh Enclosure Notes: 1. Due to manual measurement, please allow an error of 0-1cm. Please make sure you don't mind before bidding. 2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks!