The Systainer³ insert box system is built on a 50mm x 50mm (2in x 2in) grid. This 3x3 insert box occupies 9 grid units — 3 units deep by 3 units wide — so it measures 150mm x 150mm (6in x 6in). Three of these fit side by side across the full width of an Organizer L's grid in a single row, and it's a generous size for larger items or bundled accessory kits.Every Systainer³ that uses insert boxes — the Systainer³ Organizer, Sortainer and Combi — can be thought of as its own grid of these 50mm units, which keeps the math easy when planning your compartment layout. Insert boxes fix securely into that grid to divide the space and keep your hardware and small components organized and separated for storage and transport.See the Technical Specs below for the grid size of each.
