Standard 3.5 Inch Floppy Disk Holder Capacity 30 Gray/Clear Diskette Tray Standard 3.5 Inch Floppy Disk Holder Capacity 30 Gray/Clear Diskette Tray. Material: Plastic. Item Number: 150-010315. 7.5in length x 4.25in width x 4in height. Actual item size. Country of Manufacture: Unknown. Feature: Three Dividers. Nice vintage storage unit.