Thank you for viewing. This is a 1/12 scale model CBX, CBR, and other general-purpose silencer. It is handmade by an amateur. Materials: Metal, Plastic Please make your judgment based on the photos. It can be attached without modification if the outer diameter of the muffler is 4mm. Please handle the painting yourself. The photos show an example of how it can be attached. Modification may be required depending on the muffler size.