Description: Lid: Painted Ductile Iron Lid & Rim, Bolt-Down, Water-TightBolts: Stainless SteelSkirt: Galvanized SteelSpecifications:Manufacturer: Emco WheatonMax Diameter: 6.7"Clear Hole ID: 4.5"Overall Height: 7.5"Wheel Loading: Meets AASHTO H20EMCO Part Number: A0721-106