191350781 Motorcycle Inner Baffle Baffle Silencer Muffler Exhaust Baffle Volume Adjustment Motorcycle Exhaust Volume can be reduced by approximately 32%. Please refer to the following. Material: Stainless steel. Rust-resistant, hard to break, and very durable. 51mm Universal Notes Many items are made in overseas factories. There may be small scratches during the production process. Scratches that occur during production are not treated as defects. We inspect items before shipping and ship only those that we have determined to be problem-free, so please rest assured☆ (The product is of course new.) Instruction manuals and usage support are not provided.