Slim-style ring file, B4 horizontal size, capable of holding 220 sheets. - Brand: Kokuyo - Model Name: Ring File - Color: Blue - Size: B4 - Capacity: 220 sheets - Features: Slim style - Lock function: Yes Thank you for viewing. This is a set of 5 Kokuyo B4 horizontal files. I used them to store my child's cram school textbooks, but they are almost unused and show no signs of deterioration. Perfect for storing SapiX textbooks from 1st to 3rd grade. I hope you will consider them. Thank you.