The product is 4" Square 1/2" Rise Box Cover with Opening for 1 Single Receptacle - 1.594" Diameter Opening. Easy to use. The product is manufactured in China.
Hubbell Raco 812C 4-Inch Square Exposed Work Cover, 20A Receptacle 1.594-Inch diameter. Exposed work covers are used to mount switches or receptacles on boxes in surface mount applications. For one receptacle, 20A, 1.594-Inch diameter hole.