Swish Sologlyde curtain gliders, hook gliders for curtains with separate linings.
The concept of this type of glider was that you could have separate curtains and linings, and so have the curtains cleaned and still have some privacy from the linings and the reverse. This arrangement also means that the curtain hangs flush with the curtain track or rail.
As with all hook gliders a spray of Silicon Lubricant will make drawing the curtains much smoother.
NOTE sold in quantities of 1, photo for illustration.
If you have the hook glider below, then the new glider will fit your track.
I’d really recommend spraying the track with Silicone Lubricant if you have hook gliders