public function __construct($reference, $outerWidth, $outerLength, $outerDepth, $emptyWeight, $innerWidth, $innerLength, $innerDepth, $maxWeight)
{
$this->reference = $reference;
$this->outerWidth = $outerWidth;
$this->outerLength = $outerLength;
$this->outerDepth = $outerDepth;
$this->emptyWeight = $emptyWeight;
$this->innerWidth = $innerWidth;
$this->innerLength = $innerLength;
$this->innerDepth = $innerDepth;
$this->maxWeight = $maxWeight;
$this->innerVolume = $this->innerWidth * $this->innerLength * $this->innerDepth;
}