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query_test

// WP_Query arguments
$args = array(
	'nopaging'               => false,
	'posts_per_page'         => '12',
	'order'                  => 'ASC',
	'meta_query'             => array(
		array(
			'key'     => 'pa_manufacturer',
			'value'   => '$term_manufacturers',
			'compare' => 'IN',
			'type'    => 'NUMERIC',
		),
		array(
		),
	),
);

// The Query
$query = new WP_Query( $args );