Item description:Webasto Fuel Dosing Pump Damper Kit 478814 30087ACondition:Used, but in perfect condition, rubber on the inside is still soft.What is the use of this damper ?Damper kit helps to cancel some of the dosing pump noise.If the system uses plastic or metal (hard) lines it helps to soften each pump to the heater.Fuel supply would be more precise and more continious.FUEL DAMPER HAS TO BE INSTALLED LIKE THE LAST PICTUREKit includes:1pcs dosing pump damper as shown in the picture.