Thank you for viewing. I purchased these a few years ago from accessory shops at Lumine and Marui, and used them a few times before storing them at home. I don't know the brand name. The original price was around 1000-2000 yen each, but I don't remember the details. There doesn't appear to be any discoloration. Please check the photos. *I live with a small child. I do not have any pets. *I will try to ship as quickly as possible, but I work during the weekdays, so it may take some time to ship. Please consult with me if you are in a hurry. I will do my best to accommodate your request, but I may not be able to fulfill it. Please purchase only if you understand.