Description The Universal Valve 88-1810 18IN Round Manhole With Cast Iron Ring 10IN Skirt provides access to underground equipment. Recommended for high-traffic applications, where maximum manhole strength is required. Key Features Gasketed, bolted cover for total rain-tight service. Rugged cast ring for maximum strength Carries H-20 load rating requirements Bolted rain-tight cover on 98 model Compatible with E-85