I purchased this about six months ago, but I haven't used it. I am unable to answer questions about how to use it. Please purchase this if you are able to use it yourself. Please understand that this is a layman's inspection and storage, and those who are overly concerned should refrain from purchasing. I am also selling other items. If you purchase multiple items and they can be combined, I will offer a discount, so please feel free to comment. I plan to ship via Yu-Packet Mini.