Description Fibrelite offers the retail petroleum industry’s leading watertight, easy to remove, non-bolted composite manhole covers in a large selection of shapes and sizes. From general tank sump access to multiport and single port fill sump applications to interstitial sumps and monitoring wells, Fibrelite has every application covered. The OPW Fibrelite FL90BLACK-HD-SK12 is a 36" Heavy Duty Black Flat Composite Manhole Cover Bonded. Cover Includes frame and skirt. *This item is not eligible for free shipping.