Hubbell 3 gang flush rectangular non metallic concrete floor box with non metallic cover. Made of plastic. Fully adjustable. 3 inches minimum depth of pour. 8 1 1/4 inches hub. 8 1 inch to 3/4 inches and 8 1 1/4 inches to 1 inch reducers. UL Listed File Number E92074, UL Standard 514C. 1/4 inches wall thickness. Gray color. 14.3 cubic inches capacity. Measures 11 7/8 inches length by 5 27/64 inches width by 6 inches height.