Samsung ML-3471ND/XAX Service Manual page 20

2.2.1.2(g) Duplex Unit
Duplex printing function as factory option
Available Paper : Letter, Legal, Folio, Oficio and A4
2.21.2(h) Optional Tray (SCF)
For customer covenience in managing paper
Capacity : 250 sheets
Samsung Electronics
Product specification and feature
Service Manual
2-11