FM8 Grayloy-Iron UNILETS Blank Cover With Screw, Hub Size: 2 IN, Form: 8, Mounting: Screw-In, Material: Cast Grayloy-Iron, Finish: Triple-Coat (Zinc Electroplate, Chromate And Epoxy Powder Coat), Color: Gray, Standard: UL 514A, UL 514B, UL F