At the full size of a Systainer SYS 4 TL and equipped with three large drawers (with dividers) the new SORTAINER SYS 4 is an all-new lighter format than the traditional Sortainers with a new style of drawer latch removable dividers and placements for removable (optional) Storage Boxes. Optional Storage Boxes (available as a set) can be used for even greater onsite efficiency. Compatible with T-LOC and Classic Systainers (attached to bottom).