Part numbers are listed below for all the genuine Microsoft surface, Surface Pro, Surface Book, Surface RT or Surface laptop, just simply check your old or broken Microsoft charger for the part number, then simply select it below, so for example you have a Surface Go and check your old charger and it will state model: 1735, simply look below for Microsoft 1735 charger and this will display the full specification of the power adapter and an exact picture of this model, add to basket and get it tomorrow if needed quickly, in the highly unlikely event that we don't have listed your exact part number give us a call or email, as new part numbers come out from time to time, that replace older part numbers and some ac adapters can have multiple part numbers.