Curtain Rail Runner, Rear Insertion Type, 8 Pieces with Case

# After-installation Curtain Rail Runner
Roller Diameter: 5.5mm, Silent & Lightweight Type, Compatible with Square and C-shaped rails, Fits groove widths of 6-8mm.
Comes with a case, 8 pieces.

I purchased a pack of 12, but only needed 4, so I am selling the unused ones.
There was no instruction manual, but it was easy to set up by inserting it into the rail groove and turning it sideways until it clicked. It slides smoothly, and I am using the curtains without any issues.
Please consider this purchase with your understanding and agreement.