ITEM NAME:Sound Eliminator Muffler Pipe With Holes 51mm DB Killer Motorcycle Exhaust Front Features: Exhaust pipe: Universal removable exhaust pipe muffler insert DB killer with long service life. Material: Made of high grade stainless steel, high temperature and rust resistant, durable in use. Effective: Effectively reduces DB sound levels from louder aftermarket exhaust systems. Size: The mouth diameter is about 5.08 cm, and the length is about 12.6 cm Usage: It often used in motorcycle repairing and styling Specification Material: Stainless steel Color: Silver Mouth diameter: About 5.08 cm Length: About 12.6 cm Package included: 1pc x DB Killer Notice: Due to the light and screen difference, the item's color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement..Exhaust pipe: Universal removable exhaust pipe muffler insert DB killer with long service life. 1pc x DB Killer. Usage: It often used in motorcycle repairing and styling. Anyway we will try our best to avoid this kind of thing.