I'm using bundle products, and want to get the ID of simple products.

I was trying to get the ID from the product selection, but I think it's impossible.

My code:

    <?php foreach ($_options as $_option): ?>
	<?php
	$_selections = $_option->getSelections();
	foreach ($_selections as $_selection) {
	    $id = $_selection->getProductId();		    
	    $product = Mage::getModel('catalog/product')->load($id);

	    $descripcion = $product->getDescription();
	    $descriptions[ $id ] = $descripcion;
	}
	?>

But the `$_selection->getProductId()` its the product ID SELECTION, not the product ID from catalog.

Any idea?