This A3 Transparency Unit from Epson is as an accessory for the Expression 12000XL scanner. It fits onto the scanner by replacing the document cover and enables you to scan transparent materials such as films and slides in full color. For ease of use, the transparency unit can remain installed for scans of regular paper and opaque objects. The package includes a transparency guide and film holders of different sizes, ranging from 35mm strips to 4 x 5" large format film.