Three Gang Box Cover, 13.5 Cubic Inches, 8-13/16 Inches Long x 4-11/16 Inches Wide x 13/16 Inches Raised for Plaster, Galvanized Steel, Holes between Gangs are Spaced on 13/16 Inch Centers, Tapped Holes in Ears, Spaced on 3-9/32 Inches Centers to Accommodate All Standard Receptacles and Switches, Furnished with Extra Plugged Screw Holes, if these Screw Holes are Used, the Cover will fit the Next Smaller Size Box