meta_test
$meta_query = array( array( 'key' => 'pa_manufacturer', 'value' => '$term_manufacturers', 'compare' => 'IN', 'type' => 'NUMERIC', ), array( ), );
$meta_query = array( array( 'key' => 'pa_manufacturer', 'value' => '$term_manufacturers', 'compare' => 'IN', 'type' => 'NUMERIC', ), array( ), );