Fit for 5.5HP 6.5HP 3500W 4000W Gasoline Generator.Use of environmentally friendly materials, durable, long service life.Note:Due to the manual measurement,there might be some error.Name:Exhaust MufflerFit For:5.5HP 6.5HP 3500W 4000W Gasoline GeneratorPower:2-3KWPitch:12cm/4.7incolour:blackMaterial:ironPackage Contents:1 * Exhaust MufflerOnly the above package content, other products are not included.