Features:With this item you can control which side of the Y gets the hot airyou can also allow one side to get more hot air than the other or none at all (you can close one side totaly)With 2 closeable open regulating valve. Initial installation.Additional outlet to an existing system.Efficient split the flow of warm air from your heater.Fitment:For Eberspacher For Webasto For Propex HeaterSpecification:Product Name: Y Branch Outlet Connectorsize:75mmMaterial:ABScolour:BlackPackage Contents:1 x Y Branch Outlet ConnectorOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.