All products of our factory are sold at factory direct wholesale prices, with only a small gross profit margin. Therefore, no products are shipped free of charge. We apologize for any inconvenience caused. However, we will contact our long-term cooperative express delivery and freight companies to offer you favorable prices. The postage for this series of products is calculated based on the weight of the products. Since the specifications and weights of each product are different, the postage will also vary. Please contact the customer service after placing your order to calculate and modify the accurate shipping fee. You can also consult the customer service to choose the appropriate logistics method based on the weight and volume of the goods you select. Thank you!