• Revolving stool with back and ring foot rest.• Non-slip electrically conductive material mounted into recess of stool seat, flush finish.• Seat diameter is 14".• Seat adjusts with fast action 1" OD seat adjustment screw.• footrest or crossbar, Rubber tips.Options / Accessories Not Included:UMF 112- 2" ball bearing swivel caster (Factory installed only).• Height Adjust from 25" to 30".• The ring is 16 1/4".