Thank you for viewing. This is a CMC element for preventing electromagnetic wave interference. It was a set of 10, but 4 were used. There are 6 unused pieces remaining. [Seller] University-born venture (Co., Ltd.) CMC Research Institute [Contents] 6 pieces Please purchase if you understand that this item has been stored at home. It will be shipped via Yu-Packet Post Mini. Packaging will be in a plastic bag + dedicated envelope. For packaging, we reuse materials we have at home. Basically, it will be simple packaging. Please refrain from purchasing if you are looking for perfection, as this item has been stored at home and inspected by an amateur. There may be oversights. Please purchase if you understand. There are no smokers, but we have a cat. We are careful, but cat hair may get mixed in. If you are concerned or have allergies, please refrain from purchasing. I may also be listing this item elsewhere. I may suddenly cancel the listing. Please understand if the item is sold out due to a time difference.