Ricoh G188 Service Manual page 46

Printer Installation
*1: Available installation of the paper feed units are as follows:
Mainframe + One-tray PFU
Mainframe + One-tray PFU +
Two-tray PFU
You need the two-tray paper feed unit (D351-57) or the LCT (D352-57/-67) if you want to
install the finisher (B793 or B805).
The punch unit "B702" is for the 3000-sheet finisher (B805).
The punch unit "B807" is for the 1000-sheet booklet finisher (B793).
G188/G189
Mainframe + Two-tray PFU
Mainframe + LCT
2-6 SM