Brushed Aluminum GFI Cover Plate, For Omnibox® and Modulink™ Series Floor Boxes. Cover Plate Is 3.290 Inch X 4.310 Inch (83.6MM X 109.5MM). May Be Used With Wiremold CM Series Adapters and Ortronics Connectivity Systems In Conjunction With 817B, 827B, and 837B Flanges.