Even with increasing document volume, rest assured with this expandable back tube file! --- ※ The following results are based on inspections using the product number. ● This is an 8cm ⇔ 12cm type "expandable back" tube file that can change its back width in two stages to accommodate document volume. You can adjust the storage width from 8cm to 12cm depending on the amount of documents. Use the 8cm width for up to 800 sheets, and the 12cm width for 800-1200 sheets. It's an easy-to-write-on, easy-to-replace back paper type. In addition to the standard back paper, security filing back paper that emphasizes security is also included. The binding mechanism can be separated for disposal. Size: A4-S Capacity: 80 or 120 Maximum Capacity: 800 sheets (at 8cm) / 1200 sheets (at 12cm) External Dimensions (Height・Width・Back Width) (mm): 307・255・95 or 135 ● Recycled Material Ratio / Core Material: 100% recycled paper pulp ● Number of Holes / 2 holes ● Hole Spacing / 80mm pitch ● Cover / PP film lamination (Core material: recycled paper pulp) ● Replaceable back paper type ● Includes 1 index sheet and color divider cards (5 sections, 1 set) ● Includes security filing back paper and back paper with square marks. ● Storage width can be changed from 8cm ⇔ 12cm (1) Release the top and bottom locking plates and pull the cover to the left and right. (2) Hold the binding mechanism and attach the included extension pipe. (3) Set the locking plates again, and the storage width will be 12cm. Convenient! [Reference] Current product price Manufacturer's suggested retail price (excluding tax) 2810 yen ※ We are selling the previous model.