echo '<div class="spec"><a class="spec-img" href="'.get_permalink().'">'.get_the_post_thumbnail($page->ID, 'thumbnail').'</a><div class="spec-title"><a href="'.get_permalink().'">'.get_the_title().'</a></div></div><div class="its">';
<?php wp_get_attachment_image_src( $attachment_id, $size, $icon ); ?>
[0] => url
[1] => width
[2] => height
[3] => boolean: true if $url is a resized image, false if it is the original.