get Tire Price By Product Id in magento

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get Tire Price By Product Id
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$product_Id=2;

$custom = Mage::getModel('catalog/product')->load($product_Id);
                $tierPrice = $custom->getTierPrice();
                for($i=0;$i<count($tierPrice);$i++)
                    {
                  echo "price_id:".$tierPrice[$i]['price_id']."</br>";
                   echo " price:".$tierPrice[$i]['price']."</br>";
                   echo "price_qty:".$tierPrice[$i]['price_qty']."</br>";                       
                    }