Our high quality MFC desktops are made from German melamine applied to chipboard and then edged with PVC strip. They are so tough as to be virtually indestructible. We make them to either an 18mm or 25mm. On which thickness to use we would recommend 18mm for four reasons. Firstly environmental. We are using fewer materials so less of an ecological footprint. Secondly they are lighter so they use less fuel to transport and are easier for our delivery partners to handle. Thirdly for you the customer they are easier to un-package and install. Finally a metal frame already runs the length of the desk and so the desk-top provides minimal stability to the desk. However in the end the choice should always be the customers.