sterilite 30 qt and 18 qt ultra clear plastic stackable storage tote container box (12 pack) sterilite this package includes 6 30-quart storage boxes and 6 18-quart storage boxes. the ultra storage box features durable latches that attach the lid securely to the base to ensure that contents remain secure when stored. the see-through base allows contents to be easily identified, and multiple bases are able to stack on top of each other. this latch storage box is ideal for storing small items in the basement, garage, and attic. the 30-quart storage boxes each measure 18.13 inches long, 12.25 inches wide, and 11.5 inches tall. the 18-quart storage boxes each measure 18.13 inches long, 12.25 inches wide, and 7 inches tall.