Function to grab specific image IDs from media library.

Add post__in (two underscores) to your $args:

$args = array(
    'post_type' => 'attachment',
    'post_mime_type' =>'image',
    'post_status' => 'inherit',
    'posts_per_page' => -1,
    'post__in' => array( 161, 162, 163, 164, 165, 166 ),
);

Reference

WP_Query on the Codex