Leviton 80414-W Decora plastic adapter plate, Blank - No hole, with-ears, and two mounting screws. White
Price 5.08 - 5.62 USD
UL listed cover * 2 year limited warranty * QuickPort Decora Multimedia Blank Insert * Provides a way to fill-in an Decora opening in single or multi-gang applications * Compatible with Decora-style wallplates