The LEGO Storage Brick Box 4 Knobs Set of 2 Pieces is a set of two red and green plastic storage boxes designed specifically for LEGO bricks. The stackable boxes are part of the LEGO CLASSIC theme and are compatible with other LEGO sets. The set includes a Brick Box with a unique design for organizing and storing LEGO pieces. These storage boxes are ideal for keeping LEGO bricks neat and tidy while building and playing.