Quick overview from the supplier:
Cassette Feeding Unit-C1, High Capacity
High Capacity Cassette Feeding Unit-C1, for iR ADV DX C5840i / C5850i / C5860i / C5870i
Paper Capacity: 2,450 sheets (80 gsm)
Paper Type: Thin, Plain, Recycled, Color, Heavy, Bond,
Pre-punched, Letterhead
Paper Size: A4
Paper Weight: 52 to 256 gsm
Dimensions (W x D x H): 620 x 660 x 251 mm
(attached to the main unit)
Weight: Approx. 29 kg