Photo 1 of Sytopia 28" Heavy Duty Office Chair Base Replacement with Wheels(Set of 5), Metal Chair Base with Casters Total Height: 7.5" (18.9cm), Compatible Gas Cylinder Hole: 2"

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Photo 1 of Sytopia 28" Heavy Duty Office Chair Base Replacement with Wheels(Set of 5), Metal Chair Base with Casters Total Height: 7.5" (18.9cm), Compatible Gas Cylinder Hole: 2"Photo 2 of Sytopia 28" Heavy Duty Office Chair Base Replacement with Wheels(Set of 5), Metal Chair Base with Casters Total Height: 7.5" (18.9cm), Compatible Gas Cylinder Hole: 2"