View 2 of 20” Cast Iron Manhole Cover and Frame, Black Septic Tank Lid with Base, Round Sewage Basin Cover, Heavy Duty Flat Cover/Lid for Corrugated Pipe or Riser (True Diameter 19.7 in)

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View 1 of 20” Cast Iron Manhole Cover and Frame, Black Septic Tank Lid with Base, Round Sewage Basin Cover, Heavy Duty Flat Cover/Lid for Corrugated Pipe or Riser (True Diameter 19.7 in)View 2 of 20” Cast Iron Manhole Cover and Frame, Black Septic Tank Lid with Base, Round Sewage Basin Cover, Heavy Duty Flat Cover/Lid for Corrugated Pipe or Riser (True Diameter 19.7 in)View 3 of 20” Cast Iron Manhole Cover and Frame, Black Septic Tank Lid with Base, Round Sewage Basin Cover, Heavy Duty Flat Cover/Lid for Corrugated Pipe or Riser (True Diameter 19.7 in)