4 in 1 Nesting Apple Box set by Kupo.
The wooden apple box is one of the most useful pieces of grip equipment you’ll find on set. They are the ultimate multi-taskers, used for leveling dolly track, giving short people a boost, a quick stool for a weary grip, a workbench, a mounting platform, etc. They come in four standard sizes that are fractions of a standard full apple box.