1 Gang aluminum rectangular cover flange can be installed onto a metallic or non-metallic 1, 2 or 3 Gang flush rectangular Hubbell floorboxes. It includes a 6 in ground wire and four #6-32 mounting screws. The cover flange measurers 4.36 in x 3.20 in x 0.030 in high and ships with non-metallic device spacers that are removed when a GFCI, USB or another proud face device is installed into the floorbox. When used with the properly listed covers and flanges is UL514 Scrubwater compliant