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Manufacturer: MANSFIELD
Lid Part Number: 8, MPP-8, MPP8
Lid Size: 22.25 x 8.25
Tank Part Number: #8 or 162
Tank Size: 21.25 x 7.75

This looks just like the Mansfield 51 tank lid but it is wider by several inches and is much less common. If you think you have this lid, double check with the Mansfield 51 item first to compare.