Accommodating multiple load sizes, the Dematic Multishuttle Flex staging buffer accepts totes, trays and cartons. It expands and contracts to accommodate the size of the load, automatically adjusting on the fly as it travels to a storage location, so the extractor device is set to accept the load. The buffer has a load width range of 8 to 24 in. and a load length range of 6 to 34 in. The unit can provide single or double deep loading in the rack structure.