Herman Miller Eames Glides For H-Base, Shell Chair Stacking Base. (Set of 4)

Swivel glide for 5/8" OD round tube. 

Video:  How to Install The Glide on Youtube.  

https://www.youtube.com/watch?v=vsVVo3maIqQ

             Copy and Search....."How to install Herman Miller Eames Glides For H-Base, Shell Chair Stacking Base"