This Everbilt heavy-duty split sump and sewage basin cover, model THD1014Go to product viewer dialog for this item., is designed to fit standard 18-inch sump or sewage basins. Constructed from injection-molded structural foam polyethylene, it provides high durability and reliability for residential applications. The unique split cover design offers convenient access for pump maintenance or removal without the need to remove the entire cover or the vent pipe. It provides a gas-tight, radon, and odor seal when installed with appropriate sealing tape. This unit is in used-fair condition, weighs approximately 10 lbs, and features multiple molded slip flanges for flexible installation options. Please note that exact auxiliary hardware components such as bolts or washers may vary based on its used condition