Description The Emco Wheaton A0716-018C Composite Manhole Cam-Lock 18IN X 12IN is designed with lightweight, slip-resistant composite manhole covers, using the latest manufacturing technology to ensure porosity-free molding, and compact, homogeneous distribution of reinforcing fiber. The covers utilize a UV resistant treatment to protect against sun and weather damage. Key Features Slip resistant tread pattern Stainless steel hardware Cam-lock fittings - etched to show open and close directional arrows; powder coated cast steel cam Galvanized or stainless steel skirt