Specifications:

Four plus two file rack/with storage box

Three plus two (no pen container) can be exchanged left and right

Four plus two upgrades (interchangeable left and right) with storage box

Four plus two [tissue box] can be exchanged left and right

Three plus two (no pen holder) 3 drawers

Three plus two (no pen holder) 2 drawers

Three plus two (no pen holder) 1 drawer

Four plus two (including pen container) 3 drawers

Four plus two (including pen container) 2 drawers

Four plus two (including pen container) 1 drawer