- Color: Black, Gray - Length: Approximately 175cm long, 35cm wide Thank you for viewing. This is a muffler I purchased about 15 years ago at Isetan Men's in Shinjuku. It's from the brand 301, which had a shop there at the time. I removed the tag immediately after purchase because I don't like tags touching my neck. Therefore, the material is unknown. I'm selling it because it's been sitting in my closet. Instant purchase is OK. Please refrain from price negotiations.