• Premium 28" wide (diameter) heavy duty polished aluminum replacement office chair base
• HD - Built to withstand more than standard chair bases
• Fits almost all average chairs with standard gas cylinders that have a 2" (50mm) center support column
• Great for use as a replacement office chair base or in new applications
• Accepts standard casters with 7/16" x 1" mounting stems (11mmx25mm) or 7/16" x 7/8" (11mmx22mm) mounting stems
• High quality polished aluminum finish
• Very attractive slightly arched profile