I have around 40, white, A4, 4-ring binders.
The rings are 4cm, which hold up to 380 (80 gsm) sheets of paper. The spine is 6cm. The standard D-ring makes it easy to manage the paper.
They are unused and clean. Some have six dividers, while others have 20.
You can slide a title slip into the spine for easy identification of the contents
Please request them only if you can take at least 10.