Nylon insert allows smooth and quiet glide when opening and closing your curtains. Also prevent scratches on the curtain rods.
Rings with eyelets fit various curtain hooks to be inserted.
Inner diameter of the ring is 30 mm, fit up to diameter 20 mm curtain rod.
Leaving enough space between rod and ring will make the curtain glide more smooth. Make sure the inner diameter is suitable for your curtain rod before buying.