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The swivel pedestals are separate from the actual seat and Flexsteel is one manufacturer and they're available in at least three different heights .
Many times the binding can be repaired with lubrication and checking for proper operation of the release .
You need to measure from the base to the seat mount if you need replacements.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.