public function __construct($description, $width, $length, $depth, $weight, $keepFlat)
{
$this->description = $description;
$this->width = $width;
$this->length = $length;
$this->depth = $depth;
$this->weight = $weight;
$this->keepFlat = $keepFlat;
$this->volume = $this->width * $this->length * $this->depth;
}