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age from / age to

$meta_query = array(
	'relation' => 'AND',
	array(
		'key'     => 'age_from',
		'value'   => '$ageMin',
		'compare' => '<=',
	),
	array(
		'key'     => 'age_to',
		'value'   => '$ageMax',
		'compare' => '>=',
	),
);