Snippet to change product price to custom declared value and change unit of measurement for international shipping.PluginHive Plugins : https://www.pluginhive.com/plugins/

functions.php

/**
 * Snippet to change product price to custom declared value and change unit of measurement for international shipping.
 * Created at : 26 Nov 2018
 * PluginHive Plugins : https://www.pluginhive.com/plugins/
 */

add_filter( 'wf_ups_shipment_confirm_request_product_details', 'wf_ups_shipment_confirm_request_product_details', 10, 2 );
if( ! function_exists('wf_ups_shipment_confirm_request_product_details') ) {
	function wf_ups_shipment_confirm_request_product_details( $product_details, $product_data ) {
		if(!empty($product_data))
		{
			$custom_declared_value = get_post_meta( $product_data->get_id(), '_wf_ups_custom_declared_value', true );
			if(!empty($custom_declared_value))
			{
				// $product_details['Unit']['Value']=$custom_declared_value;
				$product_details['Unit']['Value']="11";
			}
			else
			{

				$product_details['Unit']['Value']="22";
			}
		}
		else
		{
			$product_details['Unit']['Value']="33";
		}
		$product_details['Unit']['UnitOfMeasurement']['Code']='SET';  // convert U/M to SET
		return $product_details;
	}
}