CoverPlug electrical outlet coversare child safety products that also insulate against air leakage from unused 3 prong grounded duplex electrical outlets . Note: Will not work on ungrounded 2 prong outlets. Paint or wallpaper if desired. As seen in October 2008 The Family Handyman Magazine , Cover Plugs are a baby safety product. Discourages children from play with unused electrical outlets, adds to a room's decor and insulates to save energy by plugging unused outlet holes. Cover Plugs reduce distraction of excess electrical outlets where building codes require electrical outlets every six feet of floor run. No tools required: push in. Sturdy plastic. Dimensions: 3.25 x 0.25 x 5 inches. Pack of 12. Made in USA.