Simplex Grinnell 4905-9921 Modular Adapter Trim Plate for 4904 Wall Strobes [New]

Dimensions: 8-1/4?Ç¥ H x 5-3/4?Ç¥ W x 3/8?Ç¥ D (210 mm x 146 mm x 9.5 mm). Box Size: 4?Ç¥ (102 mm) square. Metal Finish: Painted red. Metal Thickness: 0.060?Ç¥ (1.52 mm). Box Depth: 1-1/2?Ç¥ (38 mm) minimum; refer to audible appliance for required box depth. The Simplex 4905-9921 Trim Plate is for semi-flush mounting on 4" (102 mm) square electrical boxes.. Simplex Grinnell. TE Connectivity. 4905-9921.