WooCommerce shortcode for 'Product image'

// Get WooCommerce product image by ID via shortcode: [iw_product_image id='']
function iw_product_image_shortcode( $atts ) {
    $atts = shortcode_atts( array(
        'id' => null,
    ), $atts, 'bartag' );

    $html = '';

    if( intval( $atts['id'] ) > 0 && function_exists( 'wc_get_product' ) ){
		$_product = wc_get_product( $atts['id'] );
		$html = $_product->get_image();
    }
    return $html;
}
add_shortcode( 'iw_product_image', 'iw_product_image_shortcode' );