Blank Cover With Screw | 4 in Square, 1/2 in Raised Single Device Tile Cover | 4 in Square Plenum Box Cover; Blank With Gasket and Two Captive Screws | Domed Covers Provide Extra Wiring Space; Wiring Capacity: 0.5 Cu-in as Per Nec 314.16(a)Furbay Electric Supp