Safetyoutletcoversby Safety Innovations childproof electrical outletswith a quality sliding door outlet covermade for both child safety and insulation. Replace a two screw style outlet cover with a screwdriver and included longer screws. S liding doors minimize air leakages. Each outlet cover measures 3 inches by 4.75 inches. Fits only 3 prong duplex 110VAC -120VAC electrical outlets with two 3 prong grounded receptacles in a solid oblong receptacle. ("Decora"). Not for use on GFI (Ground Fault Interrupter) Outlets with test and reset buttons. Made in China by Safety Innovations.