The HBL6750 Series 3-Gang Cover Plate is designed to accommodate one single round opening and two blank openings, ideal for electrical installations requiring a clean finish.
It is specifically compatible with single receptacles that have a face diameter of 1.56 inches to 1.58 inches (39mm to 40mm).
Hubbell HBL6747JXXIV RACEWAY, PLT, 3G 1RND 2BNK, HBL6750, IV