This spider shaped wheel base is finished in an off white color to match your Adec patient chair bases and other patient chair manufacturers as well.  Base is 21 inches in diameter and comes with matching off white cylinder height of your choice, and 5 matching off white wheels as well.  The complete set up can be swapped in for any RGP chair in existence- unless the chair has a foot activator at the wheel base in which case you'd want to call in and discuss with a rep. 

Set up comes with beige wheels but can also come with the RGP Clear Tread casters if specified (see pic 2 of the full chair)

The spider base is also available in black as well.  ***Please document in the notes section if you prefer the black instead of the off white***