Krueger Swivel Glide for 7/16" Inside Diameter and 5/8" Outside Diameter Metal Tubing Leg
This plastic swivel glide is not longer made, but you can use the SGR62AN or SGR62I as a replacement. The SGR62AN will work, but not if you are stacking your chairs. The SGR62I ( the last letter is I, as in Island) is the one you want to use if you stack your chairs for storage. See the "Related Products" on the right hand margin of the page.