There is no problem with the product. I attempted to purchase it at another cheaper net shop, but abandon without proceeding to the next screen even if I input it many times. I was saved because I was able to purchase it with Monotaro who is the only member registered. Every time I think, it is not possible to designate the delivery date or time, so it is not easy to get the delivery to come while you know that it is absent at work. Does it matter?