admin_print_styles-{$hook_suffix} WordPress Action Hook
The admin_print_styles-{$hook_suffix} hook is one of several hooks available to add CSS styles to the WordPress Administration screens. This particular hook is fired on the {$hook_suffix} page during the CSS printing process.
do_action( "admin_print_styles-{$hook_suffix}" ) #
Fires when styles are printed for a specific admin page based on $hook_suffix.