OKI c 5400 Manual De Usuario

The duplex unit adds the function of two sided printing and  enables 
booklet printing. The duplex unit slides straight into the rear of the 
printer and requires no tools to install.

The duplex unit handles:

• Paper sizes letter, legal-14, legal-13.5, legal-13, A4, A5, B5,  and 

custom (width 5.8" to 8.5" [148 to 215.9 mm], length 8¼" to 14" [210 
to 355.6 mm]).

• Paper weights from 20 to 28 lbs. US Bond

(42 to 58 lb. Index, 75 to 105 g/m² metric).