Due to its heavy volume size, its shipping fee will be huge. Because we set each for 1.5 kg, if you purchase more than two its weight will be set as over 3 kg. However, our estimated weight will be lower than that if you purchase more than two or three because we can stack them. Thus, please send us shipping refund after purchase if you purchase more than two or three. Then, we will send you a refund. However, please don't ask us shipping refund if you only buy one of them because its initial shipping fee will be huge anyway.
Also, if you ship it to Korea its shipping fee will be 3.99 flat no matter how many of them your purchase.