Viessman boiler control unit VBC 130-A06.101.This was bought brand new for over £400 for a Vitodens 200-W combi boiler to remedy a fault but the plumber diagnosed the problem wrong and the control unit was not at fault,this unit was fitted but when it never fixed the problem it was removed so it’s basically new.It was bought from abroad so it couldn’t be returned.This will fit other boilers so please study my photos of the labels to do any cross referencing required.There are some instruction booklets that will be included and you can also have the other used control unit that works perfectly if you require,at no extra charge,just confirm by message when you buy this one.It will be posted using FedEx.Grab a bargain for a fraction of the new cost.