Function: 1. DB-Killer Motorcycle Silencer Suitable for Motorcycle Exhaust Pipe with 48mm Silencer 2. Made of high-quality stainless steel with high resistance to temperature and rust 3. In the silencer at the end of the exhaust pipe, you can clearly hear the whistle of the vehicle while driving 4. Exhaust pipe silencer ensures safe driving and reduces noise levels 5. The product is useful and practical, sturdy and durable for a long time Specification: Item Type: Exhaust Pipe Silencer Applies to models: universal diameter of motorcycle exhaust pipe mounting hole for approx. mm / 1.9in Exhaust surface size: approx. mm / 1.8in Size: approx. mm / 1.7in mm / 1.9 inch mm / 2.6in 10 mm / 0.4 inch List of packages: 1 x Mute Valve 1 x Key 1 x Screw