I am using Woo Commerce plugin and I want to display extra text for a specific product page. The product ID seen in my body is: single single-product postid-2624

So I tried the following code but it didn’t work:

<?php
function ip_more_content() {
    if ( is_single('2624'); ) {
        echo 'show something';
    }
    else {
       echo '';
    }
}
add_action( 'woocommerce_product_thumbnails' , 'ip_more_content', 9 );
?>

How can I make WP do something based on a specific product id?